Celery tasks from different applications in different log files - redis

Question

I'm looking for configure Celery on my FreeBSD server and I get some issues according to log files.
My configuration:
FreeBSD server
2 Django applications : app1 and app2
Celery is daemonized and Redis
Each application has his own Celery task
My Celery config file:
I have in /etc/default/celeryd_app1 :
# Names of nodes to start
CELERYD_NODES="worker"
# Absolute or relative path to the 'celery' command:
CELERY_BIN="/usr/local/www/app1/venv/bin/celery"
# App instance to use
CELERY_APP="main"
# Where to chdir at start.
CELERYD_CHDIR="/usr/local/www/app1/src/"
# Extra command-line arguments to the worker
CELERYD_OPTS="--time-limit=300 --concurrency=8"
# Set logging level to DEBUG
#CELERYD_LOG_LEVEL="DEBUG"
# %n will be replaced with the first part of the nodename.
CELERYD_LOG_FILE="/var/log/celery/app1/%n%I.log"
CELERYD_PID_FILE="/var/run/celery/app1/%n.pid"
# Workers should run as an unprivileged user.
CELERYD_USER="celery"
CELERYD_GROUP="celery"
# If enabled pid and log directories will be created if missing,
# and owned by the userid/group configured.
CELERY_CREATE_DIRS=1
I have exactly the same file for celeryd_app2
Django settings file with Celery settings:
CELERY_BROKER_URL = 'redis://localhost:6379'
CELERY_ACCEPT_CONTENT = ['application/json']
CELERY_RESULT_BACKEND = 'redis://localhost:6379'
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_IGNORE_RESULT = False
CELERY_TASK_TRACK_STARTED = True
# Add a one-minute timeout to all Celery tasks.
CELERYD_TASK_SOFT_TIME_LIMIT = 60
Both settings have the same redis' port.
My issue:
When I execute a celery task for app1, I find logs from this task in app2 log file with an issue like this :
Received unregistered task of type 'app1.task.my_task_for_app1'
...
KeyError: 'app1.task.my_task_for_app1'
There is an issue in my Celery config file ? I have to set different redis port ? If yes, How I can do that ?
Thank you very much

Answer 1

I guess the problem lies in the fact that you are using the same Redis database for both applications:
CELERY_BROKER_URL = 'redis://localhost:6379'
Take a look into the guide for using Redis as a broker. Just change the database for each application, e.g.
CELERY_BROKER_URL = 'redis://localhost:6379/0'
and
CELERY_BROKER_URL = 'redis://localhost:6379/1'