django/celery - celery status: Error: No nodes replied within time constraint

问题

I'm trying to deploy a simple example of celery in my production server, I've followed the tutorial in the celery website about running celery as daemon http://docs.celeryproject.org/en/latest/tutorials/daemonizing.html#daemonizing, and I got the config file in /etc/default/celeryd

  1 # Name of nodes to start
  2 # here we have a single node
  3 CELERYD_NODES="w1"
  4 # or we could have three nodes:
  5 #CELERYD_NODES="w1 w2 w3"
  6 
  7 # Where to chdir at start.
  8 CELERYD_CHDIR="/home/audiwime/cidec_sw"
  9 
 10 # Python interpreter from environment.
 11 ENV_PYTHON="/usr/bin/python26"
 12 
 13 # How to call "manage.py celeryd_multi"
 14 CELERYD_MULTI="$ENV_PYTHON $CELERYD_CHDIR/manage.py celeryd_multi"
 15 
 16 # # How to call "manage.py celeryctl"
 17 CELERYCTL="$ENV_PYTHON $CELERYD_CHDIR/manage.py celeryctl"
 18 
 19 # Extra arguments to celeryd
 20 CELERYD_OPTS="--time-limit=300 --concurrency=8"
 21 
 22 # Name of the celery config module.
 23 CELERY_CONFIG_MODULE="celeryconfig"
 24 
 25 # %n will be replaced with the nodename.
 26 CELERYD_LOG_FILE="/var/log/celery/%n.log"
 27 CELERYD_PID_FILE="/var/run/celery/%n.pid"
 28 
 29 # Workers should run as an unprivileged user.
 30 CELERYD_USER="audiwime"
 31 CELERYD_GROUP="audiwime"
 32 
 33 export DJANGO_SETTINGS_MODULE="cidec_sw.settings"

but if I run

celery status

in the terminal, i got this response:

Error: No nodes replied within time constraint

I can restart celery via the celeryd script provided in https://github.com/celery/celery/tree/3.0/extra/generic-init.d/

/etc/init.d/celeryd restart
celeryd-multi v3.0.12 (Chiastic Slide)
> w1.one.cloudwime.com: DOWN
> Restarting node w1.one.cloudwime.com: OK

I can run

python26 manage.py celeryd -l info

and my tasks in django run fine, but if I let the daemon do its work i dont get any results, don't even errors in /var/log/celery/w1.log

I know that my task has been registered because I did this

from celery import current_app
def call_celery_delay(request):
    print current_app.tasks
    run.delay(request.GET['age'])
    return HttpResponse(content="celery task set",content_type="text/html")

and I get a dictionary in wich my task appear

{'celery.chain': <@task: celery.chain>, 'celery.chunks': <@task: celery.chunks>, 'celery.chord': <@task: celery.chord>, 'tasks.add2': <@task: tasks.add2>, 'celery.chord_unlock': <@task: celery.chord_unlock>, **'tareas.tasks.run': <@task: tareas.tasks.run>**, 'tareas.tasks.add': <@task: tareas.tasks.add>, 'tareas.tasks.test_two_minute': <@task: tareas.tasks.test_two_minute>, 'celery.backend_cleanup': <@task: celery.backend_cleanup>, 'celery.map': <@task: celery.map>, 'celery.group': <@task: celery.group>, 'tareas.tasks.test_one_minute': <@task: tareas.tasks.test_one_minute>, 'celery.starmap': <@task: celery.starmap>}

but besides that I get nothing else, no result from my task, no error in the logs, nothing. Can anyone tell me what can be wrong? You are my only hope...

回答1:

Use the following command to find the problem :

C_FAKEFORK=1 sh -x /etc/init.d/celeryd start

This usually happens because there are problems in your source project(permission issues, syntax error etc.)

As mentioned in celery docs:-

If the worker starts with “OK” but exits almost immediately afterwards and there is nothing in the log file, then there is probably an error but as the daemons standard outputs are already closed you’ll not be able to see them anywhere. For this situation you can use the C_FAKEFORK environment variable to skip the daemonization step

Good Luck

Source: Celery Docs

回答2:

its because the celery daemon might not be started. This is one reason. So kindly restart it using python manage.py celeryd --loglevel=INFO

回答3:

I solved my problem, it was a very simple solution, but it was also a weird one: What I did was:

$ /etc/init.d/celerybeat restart
$ /etc/init.d/celeryd restart
$ service celeryd restart

I had to do this in that order, other way I'd get an ugly Error: No nodes replied within time constraint.

来源：https://stackoverflow.com/questions/13575711/django-celery-celery-status-error-no-nodes-replied-within-time-constraint

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python

django

celery

django-celery