Django 1.6 + RabbitMQ 3.2.3 + Celery 3.1.9 - 为什么我的 celery 工作人员会死掉并出现 : WorkerLostError: Worker exited prematurely: signal 11 (SIGSEGV)

Question

这似乎解决了一个非常相似的问题，但没有给我足够的洞察力:https://github.com/celery/billiard/issues/101听起来尝试非 SQLite 数据库可能是个好主意......

我的 django 应用程序有一个简单的 celery 设置。在我的 settings.py 文件中，我设置了一个要运行的任务，如下所示:

CELERYBEAT_SCHEDULE = {
    'sync_database': {
        'task': 'apps.data.tasks.celery_sync_database',
        'schedule': timedelta(minutes=5)
    }
}

我已按照此处的说明进行操作:http://celery.readthedocs.org/en/latest/django/first-steps-with-django.html

我可以打开两个新的终端窗口并运行 celery 进程，如下所示:

ONE - celerybeat 进程，这是计划任务所需的，并将任务放入队列中:

PROMPT> celery -A myproj beat
celery beat v3.1.9 (Cipater) is starting.
__    -    ... __   -        _
Configuration ->
    . broker -> amqp://myproj@localhost:5672//
    . loader -> celery.loaders.app.AppLoader
    . scheduler -> djcelery.schedulers.DatabaseScheduler

    . logfile -> [stderr]@%INFO
    . maxinterval -> now (0s)
[2014-02-20 16:15:20,085: INFO/MainProcess] beat: Starting...
[2014-02-20 16:15:20,086: INFO/MainProcess] Writing entries...
[2014-02-20 16:15:20,143: INFO/MainProcess] DatabaseScheduler: Schedule changed.
[2014-02-20 16:15:20,143: INFO/MainProcess] Writing entries...
[2014-02-20 16:20:20,143: INFO/MainProcess] Scheduler: Sending due task sync_database (apps.data.tasks.celery_sync_database)
[2014-02-20 16:20:20,161: INFO/MainProcess] Writing entries...

两个 - celery 工作线程，它应该将任务从队列中取出并运行它:

PROMPT> celery -A myproj worker -l info

 -------------- celery@Jons-MacBook.local v3.1.9 (Cipater)
---- **** -----
--- * ***  * -- Darwin-13.0.0-x86_64-i386-64bit
-- * - **** ---
- ** ---------- [config]
- ** ---------- .> app:         myproj:0x1105a1050
- ** ---------- .> transport:   amqp://myproj@localhost:5672//
- ** ---------- .> results:     djcelery.backends.database:DatabaseBackend
- *** --- * --- .> concurrency: 4 (prefork)
-- ******* ----
--- ***** ----- [queues]
 -------------- .> celery           exchange=celery(direct) key=celery


[tasks]
  . apps.data.tasks.celery_sync_database
  . myproj.celery.debug_task

[2014-02-20 16:15:29,402: INFO/MainProcess] Connected to amqp://myproj@127.0.0.1:5672//
[2014-02-20 16:15:29,419: INFO/MainProcess] mingle: searching for neighbors
[2014-02-20 16:15:30,440: INFO/MainProcess] mingle: all alone
[2014-02-20 16:15:30,474: WARNING/MainProcess] celery@Jons-MacBook.local ready.

但是，当任务发送时，工作人员大约有 50% 的时间运行任务，而另外 50% 的时间我会收到以下错误:

[2014-02-20 16:35:20,159: INFO/MainProcess] Received task: apps.data.tasks.celery_sync_database[960bcb6c-d6a5-4e32-8267-cfbe2b411b25]
[2014-02-20 16:36:54,561: ERROR/MainProcess] Process 'Worker-4' pid:19500 exited with exitcode -11
[2014-02-20 16:36:54,580: ERROR/MainProcess] Task apps.data.tasks.celery_sync_database[960bcb6c-d6a5-4e32-8267-cfbe2b411b25] raised unexpected: WorkerLostError('Worker exited prematurely: signal 11 (SIGSEGV).',)
Traceback (most recent call last):
  File "/Users/jon/dev/vpe/VAN/lib/python2.7/site-packages/billiard/pool.py", line 1168, in mark_as_worker_lost
    human_status(exitcode)),
WorkerLostError: Worker exited prematurely: signal 11 (SIGSEGV).

我正在运行 Mavericks 的 Macbook Pro 上进行开发。

celery 版本3.1.9兔子MQ 3.2.3Django 1.6

请注意，我使用的是 django-celery 3.1.9 并启用了 djcelery 应用程序。

Answer 1

当我从 SQLite 切换到 PostgreSQL 时，问题就消失了。