amqplib transport gives KeyError: 'No such transport: amqp'

Celery 3.0.7, Kombu 2.4.2

BROKER_URL is “amqplib://user:pass@celery-1:5672//”

Don’t have librabbitmq installed.

(dragon)ubuntu@web-3:~$ django-admin.py celery status
Traceback (most recent call last):
  File "/home/ubuntu/dragon/bin/django-admin.py", line 5, in <module>
    management.execute_from_command_line()
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/djcelery/management/commands/celery.py", line 22, in run_from_argv
    ["%s %s" % (argv[0], argv[1])] + argv[2:])
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/celery.py", line 886, in execute_from_commandline
    super(CeleryCommand, self).execute_from_commandline(argv)))
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/base.py", line 175, in execute_from_commandline
    return self.handle_argv(prog_name, argv[1:])
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/celery.py", line 881, in handle_argv
    return self.execute(command, argv)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/celery.py", line 856, in execute
    return cls(app=self.app).run_from_argv(self.prog_name, argv)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/celery.py", line 142, in run_from_argv
    return self(*args, **options)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/celery.py", line 112, in __call__
    ret = self.run(*args, **kwargs)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/celery.py", line 651, in run
    .run('ping', **dict(kwargs, quiet=True, show_body=False))
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/celery.py", line 504, in run
    return self.do_call_method(args, **kwargs)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/celery.py", line 526, in do_call_method
    replies = handler(method, *args[1:], **kwargs)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/bin/celery.py", line 569, in call
    return getattr(i, method)(*args)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/app/control.py", line 79, in ping
    return self._request('ping')
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/app/control.py", line 54, in _request
    timeout=self.timeout, reply=True))
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/celery/app/control.py", line 260, in broadcast
    channel=channel)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/pidbox.py", line 213, in _broadcast
    chan = channel or self.connection.default_channel
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/connection.py", line 623, in default_channel
    self.connection
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/connection.py", line 616, in connection
    self._connection = self._establish_connection()
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/connection.py", line 575, in _establish_connection
    conn = self.transport.establish_connection()
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/connection.py", line 636, in transport
    self._transport = self.create_transport()
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/connection.py", line 395, in create_transport
    return self.get_transport_cls()(client=self)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/connection.py", line 402, in get_transport_cls
    transport_cls = get_transport_cls(transport_cls)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/transport/__init__.py", line 107, in get_transport_cls
    _transport_cache[transport] = _get_transport_cls(transport)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/transport/__init__.py", line 89, in _get_transport_cls
    transport_module_name, transport_cls_name = resolve_transport(transport)
  File "/home/ubuntu/dragon/lib/python2.6/site-packages/kombu/transport/__init__.py", line 84, in resolve_transport
    raise KeyError('No such transport: %s' % (transport, ))
KeyError: 'No such transport: amqp'

[ask]

That is very strange… what is the value of BROKER_URL?

I get this:

>>> import kombu
>>> kombu.__version__
'2.4.2'
>>> Connection('amqp://localhost').connect()
<Connection: guest:guest@localhost:5672//>
>>> Connection('amqplib://localhost').connect()
<kombu.transport.amqplib.Connection object at 0x101396ad0>
>>> Connection('amqplib://localhost').clone().connect()
<Connection: guest:guest@stdout:5672//>
>>> Connection('amqp://localhost').clone().connect()
<Connection: guest:guest@stdout:5672//>

[prayagupa]

Thank you @ask, REPL code you posted was helpful for debugging (me being non python dev). I was struggling with similar issue while using airflow+celery. For me it happened to be broker_url was single quoted in airflow.conf but should not be.

For airflow users you can debug using following code in python REPL,

from airflow import configuration
import kombu
configuration_dict = configuration.as_dict(display_sensitive=True)
broker = configuration_dict.get('celery').get('broker_url')
rmq_conn = kombu.Connection(broker)
rmq_conn.connect()
rmq_conn.close()