Apr 07 03:33:13 worker0 python3[16392]: [2020-04-07 03:33:13,434: ERROR/MainProcess] Task handler raised error: WorkerLostError('Worker exited prematurely: signal 9 (SIGKILL).')
Apr 07 03:33:13 worker0 python3[16392]: Traceback (most recent call last):
Apr 07 03:33:13 worker0 python3[16392]:   File "/usr/lib/python3/dist-packages/billiard/pool.py", line 1267, in mark_as_worker_lost
Apr 07 03:33:13 worker0 python3[16392]:     human_status(exitcode)),
Apr 07 03:33:13 worker0 python3[16392]: billiard.exceptions.WorkerLostError: Worker exited prematurely: signal 9 (SIGKILL).
Apr 07 03:33:13 worker0 python3[16392]: [2020-04-07 03:33:13,434: ERROR/MainProcess] Task handler raised error: WorkerLostError('Worker exited prematurely: signal 9 (SIGKILL).')
                                        Traceback (most recent call last):
                                          File "/usr/lib/python3/dist-packages/billiard/pool.py", line 1267, in mark_as_worker_lost
                                            human_status(exitcode)),
                                        billiard.exceptions.WorkerLostError: Worker exited prematurely: signal 9 (SIGKILL).