Celery 提示[ERROR/MainProcess] consumer: Cannot connect to amqp://guest:**@127.0.0.1:5672//: [Errno 61] Connection refused.

[2015-12-27 13:59:14,206: ERROR/MainProcess] consumer: Cannot connect to amqp://guest:**@127.0.0.1:5672//: [Errno 61] Connection refused.
Trying again in 2.00 seconds...

[2015-12-27 13:59:16,222: ERROR/MainProcess] consumer: Cannot connect to amqp://guest:**@127.0.0.1:5672//: [Errno 61] Connection refused.
Trying again in 4.00 seconds...

[2015-12-27 13:59:20,247: ERROR/MainProcess] consumer: Cannot connect to amqp://guest:**@127.0.0.1:5672//: [Errno 61] Connection refused.
Trying again in 6.00 seconds...

[2015-12-27 13:59:26,276: ERROR/MainProcess] consumer: Cannot connect to amqp://guest:**@127.0.0.1:5672//: [Errno 61] Connection refused.
Trying again in 8.00 seconds...

解决方法:需要启动rabbitmq-server

sudo rabbitmq-server -detached