I do not get these right after starting it. I get these upon restarting. I have checked those logs. There are lot of error messages like these:
[2017-01-06 20:12:40,607: ERROR/MainProcess] Process ‘Worker-3489’ pid:None exited with ‘exitcode None’
[2017-01-06 20:12:40,618: ERROR/MainProcess] Error on stopping Pool: KeyError(None,)
Traceback (most recent call last):
File “/usr/local/lib/python2.7/dist-packages/celery/bootsteps.py”, line 155, in send_all
fun(parent, *args)
File “/usr/local/lib/python2.7/dist-packages/celery/bootsteps.py”, line 377, in stop
return self.obj.stop()
File “/usr/local/lib/python2.7/dist-packages/celery/concurrency/base.py”, line 123, in stop
self.on_stop()
File “/usr/local/lib/python2.7/dist-packages/celery/concurrency/prefork.py”, line 145, in on_stop
self._pool.join()
File “/usr/local/lib/python2.7/dist-packages/billiard/pool.py”, line 1532, in join
stop_if_not_current(self._result_handler)
File “/usr/local/lib/python2.7/dist-packages/billiard/pool.py”, line 151, in stop_if_not_current
thread.stop(timeout)
File “/usr/local/lib/python2.7/dist-packages/billiard/pool.py”, line 500, in stop
self.on_stop_not_started()
File “/usr/local/lib/python2.7/dist-packages/celery/concurrency/asynpool.py”, line 301, in on_stop_not_started
join_exited_workers(shutdown=True)
File “/usr/local/lib/python2.7/dist-packages/billiard/pool.py”, line 1119, in _join_exited_workers
del self._poolctrl[worker.pid]
KeyError: None
Traceback (most recent call last):
File “/usr/local/bin/celery”, line 11, in
sys.exit(main())
File “/usr/local/lib/python2.7/dist-packages/celery/main.py”, line 30, in main
main()
File “/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py”, line 81, in main
cmd.execute_from_commandline(argv)
File “/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py”, line 769, in execute_from_commandline
super(CeleryCommand, self).execute_from_commandline(argv)))
File “/usr/local/lib/python2.7/dist-packages/celery/bin/base.py”, line 304, in execute_from_commandline
argv = self.setup_app_from_commandline(argv)
File “/usr/local/lib/python2.7/dist-packages/celery/bin/base.py”, line 464, in setup_app_from_commandline
self.app = self.find_app(app)
File “/usr/local/lib/python2.7/dist-packages/celery/bin/base.py”, line 484, in find_app
return find_app(app, symbol_by_name=self.symbol_by_name)
File “/usr/local/lib/python2.7/dist-packages/celery/app/utils.py”, line 222, in find_app
sym = symbol_by_name(app, imp=imp)
File “/usr/local/lib/python2.7/dist-packages/celery/bin/base.py”, line 487, in symbol_by_name