AMQP server on controller:5672 is unreachable: [Errno 32] Broken pipe 如何修复？

../nova/nova-api.log:2015-12-01 15:42:03.182 3548 ERROR oslo.messaging._drivers.impl_rabbit [req-05a7d0ee-cd5f-40ad-8bd7-db20c0dadabb 46afb19b374d47b1a52418d676582f9d 85e0341cae8042d78227a8a5768a2f76 - - -] AMQP server on controller:5672 is unreachable: [Errno 32] Broken pipe. Trying again in 1 seconds.
../nova/nova-consoleauth.log:2015-12-01 15:42:04.239 1395 ERROR oslo.messaging._drivers.impl_rabbit [req-05a7d0ee-cd5f-40ad-8bd7-db20c0dadabb 46afb19b374d47b1a52418d676582f9d 85e0341cae8042d78227a8a5768a2f76 - - -] AMQP server on controller:5672 is unreachable: [Errno 32] Broken pipe. Trying again in 1 seconds.

关于nova中的AMQP 配置检查下。
这个是什么节点的问题。