Celery error : result.get times out

I've installed Celery and I'm trying to test it with the Celery First Steps Doc.

I tried using both Redis and RabbitMQ as brokers and backends, but I can't get the result with :

result.get(timeout = 10)

Each time, I get this error :

Traceback (most recent call last): File "", line 11, in File "/home/mehdi/.virtualenvs/python3/lib/python3.4/site-packages/celery/result.py", line 169, in get no_ack=no_ack, File "/home/mehdi/.virtualenvs/python3/lib/python3.4/site-packages/celery/backends/base.py", line 225, in wait_for raise TimeoutError('The operation timed out.') celery.exceptions.TimeoutError: The operation timed out.

The broker part seems to work just fine : when I run this code

from celery import Celery

app = Celery('tasks', backend='redis://localhost/', broker='amqp://')

@app.task
def add(x, y):
    return x + y

result = add.delay(4,4)

I get (as expected)

[2015-08-04 12:05:44,910: INFO/MainProcess] Received task: tasks.add[741160b8-cb7b-4e63-93c3-f5e43f8f8a02]

[2015-08-04 12:05:44,911: INFO/MainProcess] Task tasks.add[741160b8-cb7b-4e63-93c3-f5e43f8f8a02] succeeded in 0.0004287530000510742s: 8

P.S : I'm using Xubuntu 64bit

EDIT :

My app.conf

{'CELERY_RESULT_DB_TABLENAMES': None, 'BROKER_TRANSPORT_OPTIONS': {}, 'BROKER_USE_SSL': False, 'CELERY_BROADCAST_QUEUE': 'celeryctl', 'EMAIL_USE_TLS': False, 'CELERY_STORE_ERRORS_EVEN_IF_IGNORED': False, 'CELERY_CREATE_MISSING_QUEUES': True, 'CELERY_DEFAULT_QUEUE': 'celery', 'CELERY_SEND_TASK_SENT_EVENT': False, 'CELERYD_TASK_TIME_LIMIT': None, 'BROKER_URL': 'amqp://', 'CELERY_EVENT_QUEUE_EXPIRES': None, 'CELERY_DEFAULT_EXCHANGE_TYPE': 'direct', 'CELERYBEAT_SCHEDULER': 'celery.beat:PersistentScheduler', 'CELERY_MAX_CACHED_RESULTS': 100, 'CELERY_RESULT_PERSISTENT': None, 'CELERYD_POOL': 'prefork', 'CELERYD_AGENT': None, 'EMAIL_HOST': 'localhost', 'CELERY_CACHE_BACKEND_OPTIONS': {}, 'BROKER_HEARTBEAT': None, 'CELERY_RESULT_ENGINE_OPTIONS': None, 'CELERY_RESULT_SERIALIZER': 'pickle', 'CELERYBEAT_SCHEDULE_FILENAME': 'celerybeat-schedule', 'CELERY_REDIRECT_STDOUTS_LEVEL': 'WARNING', 'CELERY_IMPORTS': (), 'SERVER_EMAIL': 'celery@localhost', 'CELERYD_TASK_LOG_FORMAT': '[%(asctime)s: %(levelname)s/%(processName)s] %(task_name)s[%(task_id)s]: %(message)s', 'CELERY_SECURITY_CERTIFICATE': None, 'CELERYD_LOG_COLOR': None, 'CELERY_RESULT_EXCHANGE': 'celeryresults', 'CELERY_TRACK_STARTED': False, 'CELERY_REDIS_PASSWORD': None, 'BROKER_USER': None, 'CELERY_COUCHBASE_BACKEND_SETTINGS': None, 'CELERY_RESULT_EXCHANGE_TYPE': 'direct', 'CELERY_REDIS_DB': None, 'CELERYD_TIMER_PRECISION': 1.0, 'CELERY_REDIS_PORT': None, 'BROKER_TRANSPORT': None, 'CELERYMON_LOG_FILE': None, 'CELERYD_CONCURRENCY': 0, 'CELERYD_HIJACK_ROOT_LOGGER': True, 'BROKER_VHOST': None, 'CELERY_DEFAULT_EXCHANGE': 'celery', 'CELERY_DEFAULT_ROUTING_KEY': 'celery', 'CELERY_ALWAYS_EAGER': False, 'EMAIL_TIMEOUT': 2, 'CELERYD_TASK_SOFT_TIME_LIMIT': None, 'CELERY_WORKER_DIRECT': False, 'CELERY_REDIS_HOST': None, 'CELERY_QUEUE_HA_POLICY': None, 'BROKER_PORT': None, 'CELERYD_AUTORELOADER': 'celery.worker.autoreload:Autoreloader', 'BROKER_CONNECTION_TIMEOUT': 4, 'CELERY_ENABLE_REMOTE_CONTROL': True, 'CELERY_RESULT_DB_SHORT_LIVED_SESSIONS': False, 'CELERY_EVENT_SERIALIZER': 'json', 'CASSANDRA_DETAILED_MODE': False, 'CELERY_REDIS_MAX_CONNECTIONS': None, 'CELERY_CACHE_BACKEND': None, 'CELERYD_PREFETCH_MULTIPLIER': 4, 'BROKER_PASSWORD': None, 'CELERY_BROADCAST_EXCHANGE_TYPE': 'fanout', 'CELERY_EAGER_PROPAGATES_EXCEPTIONS': False, 'CELERY_IGNORE_RESULT': False, 'CASSANDRA_KEYSPACE': None, 'EMAIL_HOST_PASSWORD': None, 'CELERYMON_LOG_LEVEL': 'INFO', 'CELERY_DISABLE_RATE_LIMITS': False, 'CELERY_TASK_PUBLISH_RETRY_POLICY': {'interval_start': 0, 'interval_max': 1, 'max_retries': 3, 'interval_step': 0.2}, 'CELERY_SECURITY_KEY': None, 'CELERY_MONGODB_BACKEND_SETTINGS': None, 'CELERY_DEFAULT_RATE_LIMIT': None, 'CELERYBEAT_SYNC_EVERY': 0, 'CELERY_EVENT_QUEUE_TTL': None, 'CELERYD_POOL_PUTLOCKS': True, 'CELERY_TASK_SERIALIZER': 'pickle', 'CELERYD_WORKER_LOST_WAIT': 10.0, 'CASSANDRA_SERVERS': None, 'CELERYD_POOL_RESTARTS': False, 'CELERY_TASK_PUBLISH_RETRY': True, 'CELERY_ENABLE_UTC': True, 'CELERY_SEND_EVENTS': False, 'BROKER_CONNECTION_MAX_RETRIES': 100, 'CELERYD_LOG_FILE': None, 'CELERYD_FORCE_EXECV': False, 'CELERY_CHORD_PROPAGATES': True, 'CELERYD_AUTOSCALER': 'celery.worker.autoscale:Autoscaler', 'CELERYD_STATE_DB': None, 'CELERY_ROUTES': None, 'CELERYD_TIMER': None, 'ADMINS': (), 'BROKER_HEARTBEAT_CHECKRATE': 3.0, 'CELERY_ACCEPT_CONTENT': ['json', 'pickle', 'msgpack', 'yaml'], 'BROKER_LOGIN_METHOD': None, 'BROKER_CONNECTION_RETRY': True, 'CELERY_TIMEZONE': None, 'CASSANDRA_WRITE_CONSISTENCY': None, 'CELERYBEAT_MAX_LOOP_INTERVAL': 0, 'CELERYD_LOG_LEVEL': 'WARN', 'CELERY_REDIRECT_STDOUTS': True, 'BROKER_POOL_LIMIT': 10, 'CELERY_SECURITY_CERT_STORE': None, 'CELERYD_CONSUMER': 'celery.worker.consumer:Consumer', 'CELERY_INCLUDE': (), 'CELERYD_MAX_TASKS_PER_CHILD': None, 'CELERYD_LOG_FORMAT': '[%(asctime)s: %(levelname)s/%(processName)s] %(message)s', 'CELERY_ANNOTATIONS': None, 'CELERY_MESSAGE_COMPRESSION': None, 'CASSANDRA_READ_CONSISTENCY': None, 'EMAIL_USE_SSL': False, 'CELERY_SEND_TASK_ERROR_EMAILS': False, 'CELERY_QUEUES': None, 'CELERY_ACKS_LATE': False, 'CELERYMON_LOG_FORMAT': '[%(asctime)s: %(levelname)s] %(message)s', 'CELERY_TASK_RESULT_EXPIRES': datetime.timedelta(1), 'BROKER_HOST': None, 'EMAIL_PORT': 25, 'BROKER_FAILOVER_STRATEGY': None, 'CELERY_RESULT_BACKEND': 'rpc://', 'CELERY_BROADCAST_EXCHANGE': 'celeryctl', 'CELERYBEAT_LOG_FILE': None, 'CELERYBEAT_SCHEDULE': {}, 'CELERY_RESULT_DBURI': None, 'CELERY_DEFAULT_DELIVERY_MODE': 2, 'CELERYBEAT_LOG_LEVEL': 'INFO', 'CASSANDRA_COLUMN_FAMILY': None, 'EMAIL_HOST_USER': None}

via Chebli Mohamed