python – Celerybeat没有按预期工作

我决定选择rabbitmq芹菜,因为它似乎是最强劲的&以编程方式管理预定作品的完整解决方案.

我安装了rabbitmq和芹菜,当我使用celeryd -B时,任务就可以了.
但是,当我使用celerybeat命令时,任务被“发送”(或者说输出,因为我运行celeryd和celerybeat并使用-l debug选项更加冗长),但是虽然它们经常被“发送”,但它们不会执行(为了测试目的,任务应该每隔60秒将当前时间戳附加到文件).
无论如何,其他一切工作正常,因为在同一目录中的celeryd -B命令工作正常,它以预期的间隔写入文件.

我错过了什么吗？

这是$celerybeat -l debug的输出：

[2012-06-30 18:07:44,676: WARNING/MainProcess] celerybeat v2.5.5 is starting.
[2012-06-30 18:07:44,750: WARNING/MainProcess] __    -    ... __   -        _
Configuration ->
    . broker -> amqp://guest@localhost:5672//
    . loader -> celery.loaders.default.Loader
    . scheduler -> celery.beat.PersistentScheduler
    . db -> celerybeat-schedule
    . logfile -> [stderr]@DEBUG
    . maxinterval -> 5.00 minutes (300s)
[2012-06-30 18:07:44,751: DEBUG/MainProcess] Setting default socket timeout to 30
[2012-06-30 18:07:44,751: INFO/MainProcess] Celerybeat: Starting...
[2012-06-30 18:07:44,776: DEBUG/MainProcess] Current schedule:
<Entry: celery.backend_cleanup celery.backend_cleanup() {<crontab: 0 4 * (m/h/d)>}
<Entry: often tasks.output() {<freq: 1.00 minute>}
[2012-06-30 18:07:44,776: DEBUG/MainProcess] Celerybeat: Ticking with max interval->5.00 minutes
[2012-06-30 18:07:44,781: DEBUG/MainProcess] 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'2.8.4'},mechanisms: [u'PLAIN',u'AMQPLAIN'],locales: [u'en_US']
[2012-06-30 18:07:44,785: DEBUG/MainProcess] Open OK! known_hosts []
[2012-06-30 18:07:44,787: DEBUG/MainProcess] using channel_id: 1
[2012-06-30 18:07:44,789: DEBUG/MainProcess] Channel open
[2012-06-30 18:07:44,790: INFO/MainProcess] Scheduler: Sending due task tasks.output
[2012-06-30 18:07:44,794: DEBUG/MainProcess] Celerybeat: Synchronizing schedule...
[2012-06-30 18:07:44,838: DEBUG/MainProcess] tasks.output sent. id->53951ab0-022d-40a5-9f56-9a4a294294c7
[2012-06-30 18:07:44,838: DEBUG/MainProcess] Celerybeat: Waking up in 1.00 minute.