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Problema com Celery "process exiting with exitcode 1"

Hoje estava rodando o Celery em um projeto e me deparei com um problema, o “process exiting with exitcode 1” quando dava start no Celery:

[root@xen-01 gonow]# python2.7 manage.py celeryd -v 2 -B -s celery -E -l INFO
[2010-12-16 09:18:13,184: WARNING/MainProcess] celery@xen-01 v2.1.3 is starting.
[2010-12-16 09:18:13,185: WARNING/MainProcess] /usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/apps/
        worker.py:107: UserWarning: Running celeryd with superuser privileges is not encouraged!
  "Running celeryd with superuser privileges is not encouraged!")
[2010-12-16 09:18:13,185: WARNING/MainProcess] /usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/apps/
        worker.py:110: UserWarning: Using settings.DEBUG leads to a memory leak, never use this setting in a production environment!
  warnings.warn("Using settings.DEBUG leads to a memory leak, "
[2010-12-16 09:18:13,188: WARNING/MainProcess]
Configuration ->
    . broker -> ghettoq.taproot.Database://guest@localhost/
    . queues ->
        . celery -> exchange:celery (direct) binding:celery
    . concurrency -> 2
    . loader -> djcelery.loaders.DjangoLoader
    . logfile -> [stderr]@INFO
    . events -> ON
    . beat -> ON
    . tasks ->
        . gonow.vps.tasks.lvm
[2010-12-16 09:18:13,213: INFO/PoolWorker-2] child process calling self.run()
[2010-12-16 09:18:13,223: INFO/PoolWorker-3] child process calling self.run()
[2010-12-16 09:18:13,237: INFO/Beat] child process calling self.run()
[2010-12-16 09:18:13,239: INFO/Beat] Celerybeat: Starting...
[2010-12-16 09:18:13,239: WARNING/MainProcess] celery@xen-01 has started.
[2010-12-16 09:18:13,257: INFO/Beat] process shutting down
[2010-12-16 09:18:13,258: WARNING/Beat] Process Beat:
[2010-12-16 09:18:13,259: WARNING/Beat] Traceback (most recent call last):
[2010-12-16 09:18:13,259: WARNING/Beat] File "/usr/local/lib/python2.7/multiprocessing/process.py", line 232, in _bootstrap
[2010-12-16 09:18:13,284: WARNING/Beat] self.run()
[2010-12-16 09:18:13,285: WARNING/Beat] File "/usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/beat.py",
        line 392, in run
[2010-12-16 09:18:13,291: WARNING/Beat] self.service.start(embedded_process=True)
[2010-12-16 09:18:13,292: WARNING/Beat] File "/usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/beat.py",
        line 322, in start
[2010-12-16 09:18:13,292: WARNING/Beat] humanize_seconds(self.scheduler.max_interval)))
[2010-12-16 09:18:13,292: WARNING/Beat] File "/usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/beat.py",
        line 362, in scheduler
[2010-12-16 09:18:13,292: WARNING/Beat] self._scheduler = self.get_scheduler()
[2010-12-16 09:18:13,292: WARNING/Beat] File "/usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/beat.py",
        line 354, in get_scheduler
[2010-12-16 09:18:13,293: WARNING/Beat] lazy=lazy)
[2010-12-16 09:18:13,293: WARNING/Beat] File "/usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/utils/
        __init__.py", line 362, in instantiate
[2010-12-16 09:18:13,297: WARNING/Beat] return get_cls_by_name(name)(*args, **kwargs)
[2010-12-16 09:18:13,298: WARNING/Beat] File "/usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/beat.py",
        line 274, in __init__
[2010-12-16 09:18:13,298: WARNING/Beat] Scheduler.__init__(self, *args, **kwargs)
[2010-12-16 09:18:13,298: WARNING/Beat] File "/usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/beat.py",
        line 150, in __init__
[2010-12-16 09:18:13,299: WARNING/Beat] self.setup_schedule()
[2010-12-16 09:18:13,299: WARNING/Beat] File "/usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/beat.py",
        line 279, in setup_schedule
[2010-12-16 09:18:13,299: WARNING/Beat] self.merge_inplace(conf.CELERYBEAT_SCHEDULE)
[2010-12-16 09:18:13,299: WARNING/Beat] File "/usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/beat.py",
        line 250, in merge_inplace
[2010-12-16 09:18:13,299: WARNING/Beat] if self.get(key):
[2010-12-16 09:18:13,300: WARNING/Beat] File "/usr/local/lib/python2.7/UserDict.py", line 61, in get
[2010-12-16 09:18:13,310: WARNING/Beat] return self[key]
[2010-12-16 09:18:13,310: WARNING/Beat] File "/usr/local/lib/python2.7/UserDict.py", line 20, in __getitem__
[2010-12-16 09:18:13,310: WARNING/Beat] return self.data[key]
[2010-12-16 09:18:13,311: WARNING/Beat] File "/usr/local/lib/python2.7/shelve.py", line 122, in __getitem__
[2010-12-16 09:18:13,317: WARNING/Beat] value = Unpickler(f).load()
[2010-12-16 09:18:13,318: WARNING/Beat] EOFError
[2010-12-16 09:18:13,318: INFO/Beat] process exiting with exitcode 1

O motivo desse error é que antes de dar start no Celery ele já esta rodando em memoria. Quando rodamos o Celery ele cria alguns arquivos no projeto para gerenciamento de Task, um dele é o celery.dir que guarda informações das function que vai ser processada de X em X tempo.

Bom a solução para esse casa é apagar o arquivo “celery.dir” assim ele zera o task do Celery, quando der start novamente ele recria o “celery.dir”.

Agora ele só normal:

[root@xen-01 gonow]# python2.7 manage.py celeryd -v 2 -B -s celery -E -l INFO
[2010-12-16 09:18:28,539: WARNING/MainProcess] celery@xen-01 v2.1.3 is starting.
[2010-12-16 09:18:28,540: WARNING/MainProcess] /usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/apps/
        worker.py:107:
        UserWarning: Running celeryd with superuser privileges is not encouraged!
  "Running celeryd with superuser privileges is not encouraged!")
[2010-12-16 09:18:28,540: WARNING/MainProcess] /usr/local/lib/python2.7/site-packages/celery-2.1.3-py2.7.egg/celery/apps/
        worker.py:110:
        UserWarning: Using settings.DEBUG leads to a memory leak, never use this setting in a production environment!
  warnings.warn("Using settings.DEBUG leads to a memory leak, "
[2010-12-16 09:18:28,543: WARNING/MainProcess]
Configuration ->
    . broker -> ghettoq.taproot.Database://guest@localhost/
    . queues ->
        . celery -> exchange:celery (direct) binding:celery
    . concurrency -> 2
    . loader -> djcelery.loaders.DjangoLoader
    . logfile -> [stderr]@INFO
    . events -> ON
    . beat -> ON
    . tasks ->
        . gonow.vps.tasks.lvm
[2010-12-16 09:18:28,568: INFO/PoolWorker-2] child process calling self.run()
[2010-12-16 09:18:28,578: INFO/PoolWorker-3] child process calling self.run()
[2010-12-16 09:18:28,591: INFO/Beat] child process calling self.run()
[2010-12-16 09:18:28,593: INFO/Beat] Celerybeat: Starting...
[2010-12-16 09:18:28,596: WARNING/MainProcess] celery@xen-01 has started.
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