Django Celerybeat日志报错处理（'NoneType' object has no attribute 'is_due'）

分析原因

1. 按照以上意思，Django celerybeat在加载任务的时候遇见任务中有无法指定执行时间的任务，表示为NoneType类型。

2. 错误code如下：

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[2018-04-20 17:38:29,294: CRITICAL/MainProcess] beat raised exception <class 'AttributeError'>: AttributeError("'NoneType' object has no attribute 'is_due'",) Traceback (most recent call last):   File "/root/venv3/lib/python3.6/site-packages/celery/apps/beat.py", line 107, in start_scheduler     service.start()   File "/root/venv3/lib/python3.6/site-packages/celery/beat.py", line 537, in start     interval = self.scheduler.tick()   File "/root/venv3/lib/python3.6/site-packages/celery/beat.py", line 255, in tick     for e in values(self.schedule)]   File "/root/venv3/lib/python3.6/site-packages/celery/beat.py", line 255, in <listcomp>     for e in values(self.schedule)]   File "/root/venv3/lib/python3.6/site-packages/django_celery_beat/schedulers.py", line 101, in is_due     return self.schedule.is_due(self.last_run_at) AttributeError: 'NoneType' object has no attribute 'is_due' [2018-04-20 17:38:29,295: WARNING/MainProcess] Traceback (most recent call last): [2018-04-20 17:38:29,295: WARNING/MainProcess] File "/root/venv3/bin/celery", line 11, in <module> [2018-04-20 17:38:29,295: WARNING/MainProcess] sys.exit(main()) [2018-04-20 17:38:29,295: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/__main__.py", line 14, in main [2018-04-20 17:38:29,296: WARNING/MainProcess] _main() [2018-04-20 17:38:29,296: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/bin/celery.py", line 326, in main [2018-04-20 17:38:29,296: WARNING/MainProcess] cmd.execute_from_commandline(argv) [2018-04-20 17:38:29,296: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/bin/celery.py", line 488, in execute_from_commandline [2018-04-20 17:38:29,297: WARNING/MainProcess] super(CeleryCommand, self).execute_from_commandline(argv))) [2018-04-20 17:38:29,297: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/bin/base.py", line 281, in execute_from_commandline [2018-04-20 17:38:29,297: WARNING/MainProcess] return self.handle_argv(self.prog_name, argv[1:]) [2018-04-20 17:38:29,297: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/bin/celery.py", line 480, in handle_argv [2018-04-20 17:38:29,297: WARNING/MainProcess] return self.execute(command, argv) [2018-04-20 17:38:29,297: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/bin/celery.py", line 412, in execute [2018-04-20 17:38:29,298: WARNING/MainProcess] ).run_from_argv(self.prog_name, argv[1:], command=argv[0]) [2018-04-20 17:38:29,298: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/bin/base.py", line 285, in run_from_argv [2018-04-20 17:38:29,298: WARNING/MainProcess] sys.argv if argv is None else argv, command) [2018-04-20 17:38:29,298: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/bin/base.py", line 368, in handle_argv [2018-04-20 17:38:29,298: WARNING/MainProcess] return self(*args, **options) [2018-04-20 17:38:29,298: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/bin/base.py", line 244, in __call__ [2018-04-20 17:38:29,299: WARNING/MainProcess] ret = self.run(*args, **kwargs) [2018-04-20 17:38:29,299: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/bin/beat.py", line 107, in run [2018-04-20 17:38:29,299: WARNING/MainProcess] return beat().run() [2018-04-20 17:38:29,299: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/apps/beat.py", line 79, in run [2018-04-20 17:38:29,299: WARNING/MainProcess] self.start_scheduler() [2018-04-20 17:38:29,299: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/apps/beat.py", line 107, in start_scheduler [2018-04-20 17:38:29,299: WARNING/MainProcess] service.start() [2018-04-20 17:38:29,300: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/beat.py", line 537, in start [2018-04-20 17:38:29,300: WARNING/MainProcess] interval = self.scheduler.tick() [2018-04-20 17:38:29,300: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/beat.py", line 255, in tick [2018-04-20 17:38:29,300: WARNING/MainProcess] for e in values(self.schedule)] [2018-04-20 17:38:29,300: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/celery/beat.py", line 255, in <listcomp> [2018-04-20 17:38:29,300: WARNING/MainProcess] for e in values(self.schedule)] [2018-04-20 17:38:29,301: WARNING/MainProcess] File "/root/venv3/lib/python3.6/site-packages/django_celery_beat/schedulers.py", line 101, in is_due [2018-04-20 17:38:29,301: WARNING/MainProcess] return self.schedule.is_due(self.last_run_at) [2018-04-20 17:38:29,301: WARNING/MainProcess] AttributeError [2018-04-20 17:38:29,301: WARNING/MainProcess] : [2018-04-20 17:38:29,301: WARNING/MainProcess] 'NoneType' object has no attribute 'is_due'

3.第一条分析的基本正确：被指定执行的任务没有执行的时间戳导致。

4.数据库信息对比后直接确认该问题：由于该任务不想执行，所以将crontab和秒定时给去掉，所以导致以上错误。

解决方案

1. 由于不想设置时间，因此采用取消激活方案。

2. 数据库激活取消操作：如下图

结果

1.正常运行