Appears to happen randomly during a session, and also when closing the component using logger handler

Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib/python3.5/logging/__init__.py", line 1882, in shutdown
    h.close()
  File "/coap_testing_tool/coap_testing_tool/test_analysis_tool/ttproto/utils/rmq_handler.py", line 225, in close
    self.channel.close()
  File "/usr/local/lib/python3.5/dist-packages/pika/adapters/blocking_connection.py", line 1343, in close
    self._flush_output(close_ok_result.is_ready)
  File "/usr/local/lib/python3.5/dist-packages/pika/adapters/blocking_connection.py", line 1174, in _flush_output
    *waiters)
  File "/usr/local/lib/python3.5/dist-packages/pika/adapters/blocking_connection.py", line 426, in _flush_output
    raise exceptions.ConnectionClosed()