Charts display no data with error: Data column(s) for axis #0 cannot be of type string

This is the effect of the following empty response from the server which happens intermittently and then requires a restart to fix.

{
    "bottom10": [],
    "hot10": [],
    "top10": []
}

This appears to be related to a network error against the twitter API. The stack trace from the docker logs is:

Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/urllib3/response.py", line 601, in _update_chunk_length
    self.chunk_left = int(line, 16)
ValueError: invalid literal for int() with base 16: b''

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/urllib3/response.py", line 360, in _error_catcher
    yield
  File "/usr/local/lib/python3.7/site-packages/urllib3/response.py", line 666, in read_chunked
    self._update_chunk_length()
  File "/usr/local/lib/python3.7/site-packages/urllib3/response.py", line 605, in _update_chunk_length
    raise httplib.IncompleteRead(line)
http.client.IncompleteRead: IncompleteRead(0 bytes read)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/requests/models.py", line 750, in generate
    for chunk in self.raw.stream(chunk_size, decode_content=True):
  File "/usr/local/lib/python3.7/site-packages/urllib3/response.py", line 490, in stream
    for line in self.read_chunked(amt, decode_content=decode_content):
  File "/usr/local/lib/python3.7/site-packages/urllib3/response.py", line 694, in read_chunked
    self._original_response.close()
  File "/usr/local/lib/python3.7/contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "/usr/local/lib/python3.7/site-packages/urllib3/response.py", line 378, in _error_catcher
    raise ProtocolError('Connection broken: %r' % e, e)
urllib3.exceptions.ProtocolError: ('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/threading.py", line 917, in _bootstrap_inner
    self.run()
  File "/usr/local/lib/python3.7/threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "/app/core/analyser.py", line 179, in run
    for tweet in self.api.GetStreamFilter(locations=self.locations):
  File "/usr/local/lib/python3.7/site-packages/twitter/api.py", line 4593, in GetStreamFilter
    for line in resp.iter_lines():
  File "/usr/local/lib/python3.7/site-packages/requests/models.py", line 794, in iter_lines
    for chunk in self.iter_content(chunk_size=chunk_size, decode_unicode=decode_unicode):
  File "/usr/local/lib/python3.7/site-packages/requests/models.py", line 753, in generate
    raise ChunkedEncodingError(e)
requests.exceptions.ChunkedEncodingError: ('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))

CodeforLancaster / sitegeist

Charts display no data with error: Data column(s) for axis #0 cannot be of type string #22