Django芹菜任務不完成，並不斷保持待定

Question

我安裝了Django芹菜bur運行pip install django-celery。這個安裝的芹菜和必要的庫如芹菜和海帶。

我將djcelery添加到已安裝的應用程序列表中，並運行syncdb和migrate命令來創建表。

我已經安裝的RabbitMQ並創建了一個用戶和虛擬主機使用以下命令：

rabbitmqctl add_user trakklr trakklr 
rabbitmqctl add_vhost /trakklr 
rabbitmqctl set_permissions -p /trakklr trakklr ".*" ".*" ".*" 

我修改我的設置文件包含以下兩行：

BROKER_URL = "amqp://trakklr:trakklr@localhost:5672//trakklr" 
CELERY_IMPORTS = ("app.trackers.tasks",) 

我創建了一個tasks.py文件我的模塊叫做trackers：

from celery.task import task 

@task(name="trackers.tasks.add") 
def add(x, y): 
    print("In task %s" % add.request.id) 
    return x + y 

我明星泰德芹菜守護在終端窗口是這樣的：

python manage.py celeryd -l debug --discard --settings=production 

運行此噴出這樣的：

[2012-05-07 15:30:44,681: 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) 2007-2011 VMware, Inc.', u'capabilities': {}, u'platform': u'Erlang/OTP', u'version': u'2.7.1'}, mechanisms: [u'PLAIN', u'AMQPLAIN'], locales: [u'en_US'] 
[2012-05-07 15:30:44,682: DEBUG/MainProcess] Open OK! known_hosts [] 
[2012-05-07 15:30:44,683: DEBUG/MainProcess] using channel_id: 1 
[2012-05-07 15:30:44,684: DEBUG/MainProcess] Channel open 
[2012-05-07 15:30:44,686: WARNING/MainProcess] discard: Erased 3 messages from the queue. 
[2012-05-07 15:30:44,687: WARNING/MainProcess] 

-------------- celery@Webserver v2.5.3 
---- **** ----- 
--- * *** * -- [Configuration] 
-- * - **** --- . broker:  amqp://trakklr@localhost:5672//trakklr 
- ** ---------- . loader:  djcelery.loaders.DjangoLoader 
- ** ---------- . logfile:  [stderr]@DEBUG 
- ** ---------- . concurrency: 1 
- ** ---------- . events:  OFF 
- *** --- * --- . beat:  OFF 
-- ******* ---- 
--- ***** ----- [Queues] 
-------------- . celery:  exchange:celery (direct) binding:celery 


[Tasks] 
    . celery.backend_cleanup 
    . celery.chord 
    . celery.chord_unlock 
    . trackers.tasks.add 

[2012-05-07 15:30:44,693: DEBUG/MainProcess] [Worker] Loading modules. 
[2012-05-07 15:30:44,696: DEBUG/MainProcess] [Worker] Claiming components. 
[2012-05-07 15:30:44,697: DEBUG/MainProcess] [Worker] Building boot step graph. 
[2012-05-07 15:30:44,697: DEBUG/MainProcess] [Worker] New boot order: ['queues', 'pool', 'mediator', 'beat', 'autoreloader', 'timers', 'state-db', 'autoscaler', 'consumer'] 
[2012-05-07 15:30:44,699: DEBUG/MainProcess] Starting celery.concurrency.processes.TaskPool... 
[2012-05-07 15:30:44,711: DEBUG/MainProcess] created semlock with handle 3077668864 
[2012-05-07 15:30:44,711: DEBUG/MainProcess] created semlock with handle 3077664768 
[2012-05-07 15:30:44,712: DEBUG/MainProcess] created semlock with handle 3077660672 
[2012-05-07 15:30:44,712: DEBUG/MainProcess] created semlock with handle 3077656576 
[2012-05-07 15:30:44,713: DEBUG/MainProcess] created semlock with handle 3077652480 
[2012-05-07 15:30:44,713: DEBUG/MainProcess] created semlock with handle 3077648384 
[2012-05-07 15:30:44,713: DEBUG/MainProcess] created semlock with handle 3077644288 
[2012-05-07 15:30:44,714: DEBUG/MainProcess] created semlock with handle 3077640192 
[2012-05-07 15:30:44,714: DEBUG/MainProcess] created semlock with handle 3077636096 
[2012-05-07 15:30:44,734: DEBUG/MainProcess] worker handler starting 
[2012-05-07 15:30:44,738: DEBUG/MainProcess] result handler starting 
[2012-05-07 15:30:44,744: DEBUG/PoolWorker-1] Closed channel #1 
[2012-05-07 15:30:44,746: INFO/PoolWorker-1] child process calling self.run() 

現在我開了一個新的終端窗口使用Python shell來排隊這樣的任務：

>>> from app.trackers.tasks import add 
>>> task = add.delay(1, 4) 
>>> task 
<AsyncResult: c3298494-de50-41b5-8a3a-77017a1298f2> 
>>> task.state 
u'PENDING' 
>>> task.result 

任務永不完成。他們不斷被報告爲「待定」。在運行芹菜守護進程的窗口中，我沒有看到任何更改。但是，當我按CTRL^C。我得到這個額外的文字：

^C[2012-05-07 15:31:55,541: DEBUG/MainProcess] result handler got IOError(4, 'Interrupted system call') -- exiting 
[2012-05-07 15:31:55,544: DEBUG/MainProcess] celery.concurrency.processes.TaskPool OK! 
[2012-05-07 15:31:55,546: DEBUG/MainProcess] Starting celery.worker.mediator.Mediator... 
[2012-05-07 15:31:55,552: DEBUG/MainProcess] celery.worker.mediator.Mediator OK! 
[2012-05-07 15:31:55,553: DEBUG/MainProcess] Starting celery.worker.consumer.Consumer... 
[2012-05-07 15:31:55,556: WARNING/MainProcess] celery@Webserver has started. 
[2012-05-07 15:31:55,557: DEBUG/MainProcess] Consumer: Re-establishing connection to the broker... 
[2012-05-07 15:31:55,570: 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) 2007-2011 VMware, Inc.', u'capabilities': {}, u'platform': u'Erlang/OTP', u'version': u'2.7.1'}, mechanisms: [u'PLAIN', u'AMQPLAIN'], locales: [u'en_US'] 
[2012-05-07 15:31:55,571: DEBUG/MainProcess] Open OK! known_hosts [] 
[2012-05-07 15:31:55,571: DEBUG/MainProcess] Consumer: Connection established. 
[2012-05-07 15:31:55,572: DEBUG/MainProcess] using channel_id: 1 
[2012-05-07 15:31:55,573: DEBUG/MainProcess] Channel open 
[2012-05-07 15:31:55,576: DEBUG/MainProcess] basic.qos: prefetch_count->4 
[2012-05-07 15:31:55,576: DEBUG/MainProcess] using channel_id: 2 
[2012-05-07 15:31:55,577: DEBUG/MainProcess] Channel open 
[2012-05-07 15:31:55,589: DEBUG/MainProcess] Consumer: Starting message consumer... 
[2012-05-07 15:31:55,590: DEBUG/MainProcess] Consumer: Ready to accept tasks! 
[2012-05-07 15:31:55,591: INFO/MainProcess] Got task from broker: trackers.tasks.add[c3298494-de50-41b5-8a3a-77017a1298f2] 

你可以從最後一行看到，芹菜已經拿到了任務，但它只是停在那裏。另外我似乎無法弄清楚爲什麼它必須按CTRL ^C之間。它一直在等待。

Answer 1

固定。這是由於Django中的__init__.py，我使用Gevent修補了一些Python模塊。

Gunicorn使用Gevent，似乎芹菜使用Eventlet。 Gevent的線程和多處理模塊的猴子補丁在Celery中引起打嗝。