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

Question

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 don't 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 which 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. What can be wrong?

Answer 1

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.