Celery was working fine, one day the command-line worker failed to start up with the following trace:
Traceback (most recent call last):
File "/home/buildslave/venv/bin/celery", line 9, in <module>
load_entry_point('celery==3.0.7', 'console_scripts', 'celery')()
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/__main__.py", line 14, in main
main()
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 942, in main
cmd.execute_from_commandline(argv)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 886, in execute_from_commandline
super(CeleryCommand, self).execute_from_commandline(argv)))
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/base.py", line 175, in execute_from_commandline
return self.handle_argv(prog_name, argv[1:])
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 881, in handle_argv
return self.execute(command, argv)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 856, in execute
return cls(app=self.app).run_from_argv(self.prog_name, argv)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 142, in run_from_argv
return self(*args, **options)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 112, in __call__
ret = self.run(*args, **kwargs)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 214, in run
return self.target.run(*args, **kwargs)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celeryd.py", line 153, in run
return self.app.Worker(**kwargs).run()
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/apps/worker.py", line 167, in run
print(str(self.colored.cyan(' \n', self.startup_info())) +
File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/apps/worker.py", line 234, in startup_info
'conninfo': self.app.connection().as_uri(),
File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 445, in as_uri
fields = self.info()
File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 434, in info
return OrderedDict(self._info())
File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 413, in _info
D = self.transport.default_connection_params
File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 636, in transport
self._transport = self.create_transport()
File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 395, in create_transport
return self.get_transport_cls()(client=self)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 402, in get_transport_cls
transport_cls = get_transport_cls(transport_cls)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/transport/__init__.py", line 110, in get_transport_cls
_transport_cache[transport] = _get_transport_cls(transport)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/transport/__init__.py", line 92, in _get_transport_cls
transport_module_name, transport_cls_name = resolve_transport(transport)
File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/transport/__init__.py", line 87, in resolve_transport
raise KeyError('No such transport: %s' % (transport, ))
KeyError: 'No such transport: amqp'
Tracing through the code showed 'amqp' mysteriously missing from kombu.transport.TRANSPORT_ALIASES -- but that's where I lost the trail.
