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pmclanahan / django-celery-email

A Django email backend that uses a celery task for sending the email.
BSD 3-Clause "New" or "Revised" License
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fail_silently is ignored, allows DoS due to huge response delays #64

Open vsemionov opened 5 years ago

vsemionov commented 5 years ago

Overview

CeleryEmailBackend ignores the fail_silently option when enqueuing messages in send_messages(). When the Celery message broker is down and DEBUG is False, this causes huge delays in requests where a server error occurs. This allows a DoS attack.

Steps to reproduce:

  1. Ensure Celery is configured to retry failed publishing of tasks (on by default).
  2. Set DEBUG to False in settings.py.
  3. Stop the Celery message broker.
  4. Send a request that causes a server error (you can simply raise an artificial error in a view and then call it).

Expected behavior

The response should take 1-2 seconds, depending on the configured Celery message sending retry policy (see (https://docs.celeryproject.org/en/latest/userguide/calling.html#calling-retry)).

Actual behavior

The response takes about a minute (many times more than the expected time).

Analysis

A typical Django application has several middleware classes in front of the application views. The middleware classes are chained together. To propagate the request, each middleware calls get_response(), which translates to django.core.handlers.exception.convert_exception_to_response.inner(). Its code is:

def inner(request):
    try:
        response = get_response(request)
    except Exception as exc:
        response = response_for_exception(request, exc)
    return response

When an error occurs, it is logged inside response_for_exception(). The default logging configuration attempts to send an error report to the website admins, and passes fail_silently to the email backend. But when the Celery message broker is down, CeleryEmailBackend does not suppress the exception thrown by Celery/Kombu (kombu.exceptions.OperationalError), and the exception escapes out of response_for_exception(). It is caught by the get_response() call of the previous middleware, which in turn repeats the process. This retry process is repeated as many times as the number of middleware classes configured, which significantly multiplies the expected response delay.

Note: This is not caused by a Celery issue ((https://github.com/celery/celery/issues/4296)). I am aware of this issue and have applied a workaround, but the problem described here still persists.

Solution

I have managed to work around this issue by wrapping CeleryEmailBackend in the following subclass:

logger = logging.getLogger(__name__)

class CustomCeleryEmailBackend(CeleryEmailBackend):
    def send_messages(self, *args, **kwargs):
        try:
            super().send_messages(*args, **kwargs)
        except OperationalError:
            if not self.fail_silently:
                raise
            logger.exception('Error enqueuing messages.')

A fix in the library code would be similar and quite simple - wrap calls to send_emails.delay() in a try block, and if an OperationalError exception is caught and fail_silently is set, suppress the exception, possibly logging it to prevent it from being unnoticed.

Stacktrace

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/views/decorators/http.py", line 40, in inner
    return func(request, *args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/views/decorators/cache.py", line 44, in _wrapped_view_func
    response = view_func(request, *args, **kwargs)
  File "/Users/victor/work/someapp/web/views/public.py", line 116, in index
    raise Exception('test error')
Exception: test error

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/work/someapp/web/middleware/apperror.py", line 10, in __call__
    return self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/work/someapp/web/middleware/timezone.py", line 19, in middleware
    return get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/blacklist/middleware.py", line 25, in middleware
    return get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/work/someapp/web/middleware/proxy.py", line 82, in middleware
    return get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 42, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/wsgiref/handlers.py", line 137, in run
    self.result = application(self.environ, self.start_response)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/wsgi.py", line 141, in __call__
    response = self.get_response(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/base.py", line 75, in get_response
    response = self._middleware_chain(request)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
    response = response_for_exception(request, exc)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/handlers/exception.py", line 95, in response_for_exception
    exc_info=sys.exc_info(),
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 228, in log_response
    exc_info=exc_info,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1412, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1519, in _log
    self.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1529, in handle
    self.callHandlers(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 1591, in callHandlers
    hdlr.handle(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/logging/__init__.py", line 905, in handle
    self.emit(record)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 122, in emit
    self.send_mail(subject, message, fail_silently=True, html_message=html_message)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/utils/log.py", line 125, in send_mail
    mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/__init__.py", line 101, in mail_admins
    mail.send(fail_silently=fail_silently)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/djcelery_email/backends.py", line 17, in send_messages
    result_tasks.append(send_emails.delay(chunk_messages, self.init_kwargs))
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 427, in delay
    return self.apply_async(args, kwargs)
  File "/Users/victor/work/someapp/web/tasks.py", line 10, in apply_async
    return super().apply_async(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/task.py", line 570, in apply_async
    **options
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/base.py", line 756, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/celery/app/amqp.py", line 552, in send_task_message
    **properties
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 181, in publish
    exchange_name, declare,
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 510, in _ensured
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 44, in __call__
    value = self.__value__ = self.__contract__()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 852, in default_channel
    self.ensure_connection(**conn_opts)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 436, in _reraise_as_library_errors
    sys.exc_info()[2])
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/vine/five.py", line 194, in reraise
    raise value.with_traceback(tb)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 431, in _reraise_as_library_errors
    yield
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 422, in ensure_connection
    callback, timeout=timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/utils/functional.py", line 343, in retry_over_time
    return fun(*args, **kwargs)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 275, in connect
    return self.connection
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 823, in connection
    self._connection = self._establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/connection.py", line 778, in _establish_connection
    conn = self.transport.establish_connection()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/connection.py", line 307, in connect
    self.transport.connect()
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 77, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/Users/victor/anaconda3/envs/someapp/lib/python3.7/site-packages/amqp/transport.py", line 161, in _connect
    self.sock.connect(sa)
kombu.exceptions.OperationalError: [Errno 61] Connection refused
[29/Jul/2019 15:10:12] "GET / HTTP/1.1" 500 59