Multiple celerycam procceses on the same server - celery

Question

I have two celerycam processes configured for running under supervisor. Here is part of my supervisord.conf:
[program:dev1_celerycam]
directory = /var/www/dev1.example.com
command = /usr/bin/python2.7 /var/www/dev1.example.com/manage.py celerycam --logfile=/var/log/supervisor/dev1_celerycam.log --workdir=/var/www/dev1.example.com
stderr_logfile = /var/log/supervisor/dev1_celerycam_error.log
stdout_logfile = /var/log/supervisor/dev1_celerycam.log
exitcodes=0,2
priority=993
[program:dev_celerycam]
directory = /var/www/dev.example.com
command = /usr/bin/python2.7 /var/www/dev.example.com/manage.py celerycam --logfile=/var/log/supervisor/dev_celerycam.log --workdir=/var/www/dev.example.com
stderr_logfile = /var/log/supervisor/dev_celerycam_error.log
stdout_logfile = /var/log/supervisor/dev_celerycam.log
exitcodes=0,2
priority=995
Also I have two processes of celeryd in the supervisord.conf. They starts perfectly fine on the same server. But for one of celerycam processes I get next in supervisord.log:
2013-09-01 09:35:12,546 INFO exited: dev_celerycam (exit status 1; not expected)
2013-09-01 09:35:12,546 INFO received SIGCLD indicating a child quit
2013-09-01 09:35:15,555 INFO spawned: 'dev_celerycam' with pid 25504
2013-09-01 09:35:16,540 INFO exited: dev_celerycam (exit status 1; not expected)
2013-09-01 09:35:16,540 INFO received SIGCLD indicating a child quit
2013-09-01 09:35:17,542 INFO gave up: dev_celerycam entered FATAL state, too many start retries too quickly
This occurs for dev_celerycam or dev1_celerycam on supervisord restart. One of them starts fine while another one fails. Looks like it happens randomly.
Is there any chance to get both celerycam processes working?

Answer 1

Both celerycam process created pid file in the same path somehow. Had to add --pidfile parameter for each of celerycam processes.