Celeryd Worker停止处理任务

Question

我有一个celeryd和两个worker一起运行，看着他们，我看到他们分别接受4个任务，处理它们，然后停止处理任务。(请注意，这些任务是长时间运行的，处理时间长达2分钟)。

celeryctl提供以下信息：

django@server: ./manage.py celeryctl inspect active
<- active
DEBUG 2012-06-01 12:51:11,330 amqplib 661 Start from server, version: 8.0, properties: {u'information': u'Licensed under the MPL.  See http://www.rabbitmq.com/', u'product': u'RabbitMQ', u'copyright': u'Copyright (C) 2007-2012 VMware, Inc.', u'capabilities': {}, u'platform': u'Erlang/OTP', u'version': u'2.8.2'}, mechanisms: [u'PLAIN', u'AMQPLAIN'], locales: [u'en_US']
DEBUG 2012-06-01 12:51:11,331 amqplib 507 Open OK! known_hosts []
DEBUG 2012-06-01 12:51:11,331 amqplib 70 using channel_id: 1
DEBUG 2012-06-01 12:51:11,332 amqplib 484 Channel open
-> eso-dev: OK
    - empty -

django@server:  ./manage.py celeryctl inspect scheduled
<- scheduled
DEBUG 2012-06-01 12:52:07,107 amqplib 661 Start from server, version: 8.0, properties: {u'information': u'Licensed under the MPL.  See http://www.rabbitmq.com/', u'product': u'RabbitMQ', u'copyright': u'Copyright (C) 2007-2012 VMware, Inc.', u'capabilities': {}, u'platform': u'Erlang/OTP', u'version': u'2.8.2'}, mechanisms: [u'PLAIN', u'AMQPLAIN'], locales: [u'en_US']
DEBUG 2012-06-01 12:52:07,108 amqplib 507 Open OK! known_hosts []
DEBUG 2012-06-01 12:52:07,108 amqplib 70 using channel_id: 1
DEBUG 2012-06-01 12:52:07,109 amqplib 484 Channel open
-> eso-dev: OK
    - empty -

django@server: ./manage.py celeryctl inspect registered
<- registered
DEBUG 2012-06-01 12:52:20,567 amqplib 661 Start from server, version: 8.0, properties: {u'information': u'Licensed under the MPL.  See http://www.rabbitmq.com/', u'product': u'RabbitMQ', u'copyright': u'Copyright (C) 2007-2012 VMware, Inc.', u'capabilities': {}, u'platform': u'Erlang/OTP', u'version': u'2.8.2'}, mechanisms: [u'PLAIN', u'AMQPLAIN'], locales: [u'en_US']
DEBUG 2012-06-01 12:52:20,568 amqplib 507 Open OK! known_hosts []
DEBUG 2012-06-01 12:52:20,568 amqplib 70 using channel_id: 1
DEBUG 2012-06-01 12:52:20,569 amqplib 484 Channel open
-> eso-dev: OK
    * celery.backend_cleanup
    * celery.chord
    * celery.chord_unlock
    *
celery_haystack.tasks.CeleryHaystackSignalHandler
    *
celery_haystack.tasks.CeleryHaystackUpdateIndex
    * convert.tasks.create_pdf
    * convert.tasks.create_pngs

此外，每次发生这种情况时，打印到日志的最后一件事是：

[2012-06-01 12:17:53,777: INFO/MainProcess] Task convert.tasks.create_pdf[319984de-5bc4-47fc-891f-273d827d625f] retry: None
None
[2012-06-01 12:17:54,327: INFO/MainProcess] Task convert.tasks.create_pdf[8a89f3c1-e991-487e-a2db-a57d23bae17f] retry: None
None

就在打印之前，任务也恰好失败了，在我的代码中，我所调用的全部内容是：

except HTTPError, e:
    statsd.incr('A.stat')
    log.warn('Woops: %s', e)
    create_pdf.retry()

如果我终止celeryd (^C，它马上就死了，不再等待任务)并重新启动它，它会继续运行，就像没有发生任何事情一样，再多执行几个任务，然后再死一次(我认为它总是在create_pdf任务上，但日志显示这个任务失败了，正在重试，没有任何问题)

Answer 1

这是一个已知的错误，芹菜已在3.0版本中修复。(Issue 707)