Celery error, unregistered task

The error:

Received unregistered task of type u'<mytask>'.
The message has been ignored and discarded.

Did you remember to import the module containing this task?
Or maybe you are using relative imports?
Please see http://bit.ly/gLye1c for more information.

One possible solution:

Restart celery on the server.

This error can be due to celery not restarting after you’ve added a task.

One clap, two clap, three clap, forty?

By clapping more or less, you can signal to us which stories really stand out.