When unable to connect to AWS Cloudwatch, AttributeError: 'CloudWatchLogsHandler' object has no attribute 'sink' when shutting down logbeam handler

[terrisgit]

If you create a logbeam logging handler on a machine that has no Internet access, an error like the following occurs while the application closes:

Traceback (most recent call last):
File "/usr/local/Cellar/python3/3.6.4_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/runpy.py", line 193, in _run_module_as_main
"main", mod_spec)
File "/usr/local/Cellar/python3/3.6.4_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/Users/terris/science37/edc-export-service/edcexport/main.py", line 16, in
EDCExportService().start()
File "/Users/terris/science37/edc-export-service/edcexport/edcexport.py", line 75, in start
loop.run_forever()
File "/usr/local/Cellar/python3/3.6.4_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/asyncio/base_events.py", line 421, in run_forever
self._run_once()
File "/usr/local/Cellar/python3/3.6.4_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/asyncio/base_events.py", line 1395, in _run_once
event_list = self._selector.select(timeout)
File "/usr/local/Cellar/python3/3.6.4_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/selectors.py", line 577, in select
kev_list = self._kqueue.control(None, max_ev, timeout)
KeyboardInterrupt
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
File "/usr/local/Cellar/python3/3.6.4_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/logging/init.py", line 1944, in shutdown
h.close()
File "/Users/terris/venv/edc/lib/python3.6/site-packages/logbeam/init.py", line 160, in close
self.sink.shutdown()
AttributeError: 'CloudWatchLogsHandler' object has no attribute 'sink'