sudo -u www-data python manage.py celeryd --detach --logfile=/tmp/log.log

Celery 0.8.0 is starting.
Configuration ->
* Broker -> amqp://cvtraq_vhost@127.0.0.1:5672
* Exchange -> celery (direct)
* Consumer -> Queue:celery Routing:celery
* Concurrency -> 1
* Statistics -> OFF
Celery has started.
Traceback (most recent call last):
File "manage.py", line 11, in
execute_manager(settings)
File "/usr/lib/python2.5/site-packages/django/core/management/init.py", line 362, in execute_manager
utility.execute()
File "/usr/lib/python2.5/site-packages/django/core/management/init.py", line 303, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/lib/python2.5/site-packages/django/core/management/base.py", line 195, in run_from_argv
self.execute(_args, *_options.dict)
File "/usr/lib/python2.5/site-packages/django/core/management/base.py", line 222, in execute
output = self.handle(_args, *_options)
File "/usr/lib/python2.5/site-packages/celery-0.8.0-py2.5.egg/celery/management/commands/celeryd.py", line 17, in handle
run_worker(**options)
File "/usr/lib/python2.5/site-packages/celery-0.8.0-py2.5.egg/celery/bin/celeryd.py", line 253, in run_worker
pidlock = acquire_pidlock(pidfile)
File "/usr/lib/python2.5/site-packages/celery-0.8.0-py2.5.egg/celery/bin/celeryd.py", line 165, in acquire_pidlock
os.kill(pid, 0)
TypeError: an integer is required