在exitcode 2接受任务后工人丢失错误

Question

我是芹菜的新手。我已使用periodic_task将备份脚本添加到celery。从日志中我看到"Task accepted: main"后立即看到日志中出现以下错误。

[2017-09-21 06:01:00,257: ERROR/MainProcess] Process 'PoolWorker-5' pid:XXXX
exited with 'exitcode 2'

[2017-09-21 06:01:00,268: ERROR/MainProcess] Task handler raised error: WorkerLostError('Worker exited prematurely: exitcode 2.',)

Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/billiard/pool.py", line 1224, in mark_as_worker_lost
    human_status(exitcode)),
WorkerLostError: Worker exited prematurely: exitcode 2.

提前致谢。