OctoPrint process exited overnight.. logs just show Polar Cloud errors for 40 mins beforehand?

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1

What is the problem? In the middle of a 48-hour print, I woke up to "The OctoPrint server is currently not running"

What did you already try to solve it? I looked at the logs: ~/.octoprint/logs/octoprint.log has a load of repeated warnings, errors etc from Polar Cloud trying to retry HTTP requests which fail with a 502. The final few messages are below, but note they are identical to those that were repeating for ~40 mins prior:

Logs (octoprint.log, serial.log or output on terminal tab, ...)

2019-07-21 22:40:34,620 - octoprint.plugins.polarcloud - ERROR - Unable to open socket ConnectionError: '('Connection aborted.', BadStatusLine("''",))' @ init.py:_create_socket:255
Traceback (most recent call last):
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint_polarcloud/init.py", line 255, in _create_socket
self._socket = SocketIO(self._settings.get(['service']), Namespace=LoggingNamespace, verify=True, wait_for_connection=False)
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/init.py", line 353, in init
resource, hurry_interval_in_seconds, **kw)
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/init.py", line 54, in init
self._transport
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/init.py", line 62, in _transport
self._engineIO_session = self._get_engineIO_session()
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/init.py", line 76, in _get_engineIO_session
transport.recv_packet())
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/transports.py", line 82, in recv_packet
**self._kw_get)
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/transports.py", line 180, in get_response
raise ConnectionError(e)
ConnectionError: ('Connection aborted.', BadStatusLine("''",))
2019-07-21 22:40:36,762 - octoprint.plugins.polarcloud - INFO - Socket created.
2019-07-21 22:40:37,193 - octoprint.plugins.polarcloud - WARNING - unable to create socket to Polar Cloud, check again in 2.02632599323 seconds
2019-07-21 22:40:40,606 - octoprint_anywhere.mjpeg_stream - ERROR - [Errno 32] Broken pipe
2019-07-21 22:40:59,084 - octoprint_anywhere.mjpeg_stream - ERROR - [Errno 32] Broken pipe
2019-07-21 22:41:20,025 - octoprint_anywhere.mjpeg_stream - ERROR - [Errno 32] Broken pipe
2019-07-21 22:41:40,516 - octoprint_anywhere.mjpeg_stream - ERROR - [Errno 32] Broken pipe
2019-07-21 22:42:04,690 - octoprint_anywhere.mjpeg_stream - ERROR - [Errno 32] Broken pipe
2019-07-21 22:42:08,631 - octoprint.plugins.polarcloud - ERROR - Unable to open socket ConnectionError: '('Connection aborted.', BadStatusLine("''",))' @ init.py:_create_socket:255
Traceback (most recent call last):
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint_polarcloud/init.py", line 255, in _create_socket
self._socket = SocketIO(self._settings.get(['service']), Namespace=LoggingNamespace, verify=True, wait_for_connection=False)
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/init.py", line 353, in init
resource, hurry_interval_in_seconds, **kw)
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/init.py", line 54, in init
self._transport
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/init.py", line 62, in _transport
self._engineIO_session = self._get_engineIO_session()
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/init.py", line 76, in _get_engineIO_session
transport.recv_packet())
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/transports.py", line 82, in recv_packet
**self._kw_get)
File "/home/pi/oprint/local/lib/python2.7/site-packages/socketIO_client/transports.py", line 180, in get_response
raise ConnectionError(e)
ConnectionError: ('Connection aborted.', BadStatusLine("''",))
2019-07-21 22:42:08,818 - octoprint.plugins.polarcloud - INFO - Socket created.
2019-07-21 22:42:09,347 - octoprint.plugins.polarcloud - WARNING - unable to create socket to Polar Cloud, check again in 2.25298247433 seconds

Additional information about your setup CR-10S, OctoPrint 1.3.11, OctoPi 0.16.0

Any ideas? The uptime for the Pi is ~34 days.. the last log entry just looks like another retry will be done in a few sec, but it cuts off?

2

Hi @kierenj!

To me it seems, that PolarCloud and OctoPrint_Anywhere lost connection to their servers.
Could it be, that the router made a firmware update and cut the internet connection during that procedure?

3

I don't think so - a 502 error would come from their server.
But anyway - why would that cause the octoprint process to exit?

4

It normally shouldn't, but if for some reason the plugin leaks memory or something like this while not connected, it could crash and take the whole process with it.

5

It's possible that one of these two companies rebooted some server or proxy while your print job was running. This is always the danger of relying upon cloud-based services.