Celery Received unregistered task of type (run example)

Question

I\'m trying to run example from Celery documentation.

I run: celeryd --loglevel=INFO

/usr/local/lib/python2.7/dist-packages/celery/loade         


        

Answer 1

If you use autodiscover_tasks, make sure that your functions to be registered stay in the tasks.py, not any other file. Or celery can not find the functions you want to register.

Use app.register_task will also do the job, but seems a little naive.

Please refer to this official specification of autodiscover_tasks.

def autodiscover_tasks(self, packages=None, related_name='tasks', force=False):
    """Auto-discover task modules.

    Searches a list of packages for a "tasks.py" module (or use
    related_name argument).

    If the name is empty, this will be delegated to fix-ups (e.g., Django).

    For example if you have a directory layout like this:

    .. code-block:: text

        foo/__init__.py
           tasks.py
           models.py

        bar/__init__.py
            tasks.py
            models.py

        baz/__init__.py
            models.py

    Then calling ``app.autodiscover_tasks(['foo', bar', 'baz'])`` will
    result in the modules ``foo.tasks`` and ``bar.tasks`` being imported.

    Arguments:
        packages (List[str]): List of packages to search.
            This argument may also be a callable, in which case the
            value returned is used (for lazy evaluation).
        related_name (str): The name of the module to find.  Defaults
            to "tasks": meaning "look for 'module.tasks' for every
            module in ``packages``."
        force (bool): By default this call is lazy so that the actual
            auto-discovery won't happen until an application imports
            the default modules.  Forcing will cause the auto-discovery
            to happen immediately.
    """