`Event loop is closed` warning errors fired by plugin.py

[sanchezfdezjavier]

For every integration test run in our 20 charms I'm getting these warnings. I'm aware that more people are experiencing the same. Any fix?

================== 1 passed, 3 warnings in 341.19s (0:05:41) ===================
/home/ubuntu/actions-runner/_work/charmed-magma/charmed-magma/orchestrator-bundle/orc8r-accessd-operator/.tox/integration/lib/python3.8/site-packages/paramiko/transport.py:236: CryptographyDeprecationWarning: Blowfish has been deprecated
  "class": algorithms.Blowfish,
Task was destroyed but it is pending!
task: <Task pending name='Task-11' coro=<Connection._pinger() running at /home/ubuntu/actions-runner/_work/charmed-magma/charmed-magma/orchestrator-bundle/orc8r-accessd-operator/.tox/integration/lib/python3.8/site-packages/juju/client/connection.py:572> wait_for=<Future pending cb=[<TaskWakeupMethWrapper object at 0x7f0a204f4310>()]>>
Task was destroyed but it is pending!
task: <Task pending name='Task-6' coro=<Connection._receiver() running at /home/ubuntu/actions-runner/_work/charmed-magma/charmed-magma/orchestrator-bundle/orc8r-accessd-operator/.tox/integration/lib/python3.8/site-packages/juju/client/connection.py:524> wait_for=<Future pending cb=[<TaskWakeupMethWrapper object at 0x7f0a21da8460>()]>>
Task was destroyed but it is pending!
task: <Task pending name='Task-4' coro=<WebSocketCommonProtocol.keepalive_ping() running at /home/ubuntu/actions-runner/_work/charmed-magma/charmed-magma/orchestrator-bundle/orc8r-accessd-operator/.tox/integration/lib/python3.8/site-packages/websockets/protocol.py:977> wait_for=<Future pending cb=[<TaskWakeupMethWrapper object at 0x7f0a2055fdc0>()]>>
Fatal error on SSL transport
protocol: <asyncio.sslproto.SSLProtocol object at 0x7f0a21de78b0>
transport: <_SelectorSocketTransport closing fd=11>
Traceback (most recent call last):
  File "/usr/lib/python3.8/asyncio/selector_events.py", line 910, in write
    n = self._sock.send(data)
OSError: [Errno 9] Bad file descriptor

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.8/asyncio/sslproto.py", line 6[85](https://github.com/canonical/charmed-magma/runs/6271545946?check_suite_focus=true#step:4:85), in _process_write_backlog
    self._transport.write(chunk)
  File "/usr/lib/python3.8/asyncio/selector_events.py", line [91](https://github.com/canonical/charmed-magma/runs/6271545946?check_suite_focus=true#step:4:91)6, in write
    self._fatal_error(exc, 'Fatal write error on socket transport')
  File "/usr/lib/python3.8/asyncio/selector_events.py", line 711, in _fatal_error
    self._force_close(exc)
  File "/usr/lib/python3.8/asyncio/selector_events.py", line 723, in _force_close
    self._loop.call_soon(self._call_connection_lost, exc)
  File "/usr/lib/python3.8/asyncio/base_events.py", line 719, in call_soon
    self._check_closed()
  File "/usr/lib/python3.8/asyncio/base_events.py", line 508, in _check_closed
    raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed

[addyess]

It turns out this is because the ops_test plugin was opening a connection to a juju controller but didn't properly close it. I'll be addressing this shortly in a new PR

[sanchezfdezjavier]

It worked, thanks!