在 RedHat 6.5 上将 MCollective (2.2.3) 与 RabbitMQ (3.1.5) 结合使用时，MCollective 在第一次成功 ping 之后停止响应。
当我重新启动 RabbitMQ 时，它又可以工作了。
root@rabbitmqserver# /etc/init.d/rabbitmq-server restart
Restarting rabbitmq-server: SUCCESS
rabbitmq-server.
root@rabbitmqserver# rabbitmqctl list_consumers -p /mcollective | grep directed
amq.gen-1amX9Z9w6jBKNP7IQrMfjg <[email protected]> Q_/exchange/mcollective_directed/srv114 false
amq.gen-dxFvTuxvQZOU0d1e7XuJJg <[email protected]> Q_/exchange/mcollective_directed/srv98 false
amq.gen-lwttnRCCTON9hgPg7X2zZw <[email protected]> Q_/exchange/mcollective_directed/srv99 false
amq.gen-pG4o5csOGcam9mxvIQvQ7g <[email protected]> Q_/exchange/mcollective_directed/srv57 false
amq.gen-xtRFm6aAoeV2mDO9dTAyyA <[email protected]> Q_/exchange/mcollective_directed/srv115 false
user@mco-client$ mco ping
srv114 time=66.49 ms
srv57 time=69.34 ms
---- ping statistics ----
2 replies max: 69.34 min: 66.49 avg: 67.91
user@mco-client$ mco ping
---- ping statistics ----
No responses received
root@rabbitmqserver# rabbitmqctl list_consumers -p /mcollective | grep directed
amq.gen-1amX9Z9w6jBKNP7IQrMfjg <[email protected]> Q_/exchange/mcollective_directed/srv114 false
amq.gen-dxFvTuxvQZOU0d1e7XuJJg <[email protected]> Q_/exchange/mcollective_directed/srv98 false
amq.gen-lwttnRCCTON9hgPg7X2zZw <[email protected]> Q_/exchange/mcollective_directed/srv99 false
amq.gen-pG4o5csOGcam9mxvIQvQ7g <[email protected]> Q_/exchange/mcollective_directed/srv57 false
amq.gen-xtRFm6aAoeV2mDO9dTAyyA <[email protected]> Q_/exchange/mcollective_directed/srv115 false
如果我尝试使用另一个命令（例如package），它会在发现之后立即失败（即重新启动 RabbitMQ 后）：
user@mco-client$ mco package status bash
Do you really want to operate on packages unfiltered? (y/n): y
| [ > ] 0 / 2
[... stalled ...]
过了一会儿，我开始在 MCollective 服务器日志中看到以下内容：
E, [2014-03-18T11:51:01.332969 #24456] ERROR -- : base.rb:29:in `run' Sending registration message failed: Stomp::Error::NoCurrentConnection
E, [2014-03-18T11:55:35.759653 #24456] ERROR -- : agents.rb:138:in `dispatch' Execution of discovery failed: Stomp::Error::NoCurrentConnection
E, [2014-03-18T11:55:35.760040 #24456] ERROR -- : agents.rb:139:in `dispatch' /usr/lib/ruby/gems/1.8/gems/stomp-1.2.2/lib/stomp/connection.rb:331:in `publish'
/usr/libexec/mcollective/mcollective/connector/rabbitmq.rb:184:in `publish'
/usr/lib/ruby/site_ruby/1.8/mcollective/message.rb:230:in `publish'
/usr/lib/ruby/1.8/timeout.rb:67:in `timeout'
/usr/lib/ruby/site_ruby/1.8/mcollective/message.rb:218:in `publish'
/usr/lib/ruby/site_ruby/1.8/mcollective/runner.rb:129:in `reply'
/usr/lib/ruby/site_ruby/1.8/mcollective/runner.rb:83:in `agentmsg'
/usr/lib/ruby/site_ruby/1.8/mcollective/agents.rb:132:in `dispatch'
/usr/lib/ruby/1.8/timeout.rb:67:in `timeout'
/usr/lib/ruby/site_ruby/1.8/mcollective/agents.rb:125:in `dispatch'
/usr/lib/ruby/site_ruby/1.8/mcollective/agents.rb:121:in `initialize'
/usr/lib/ruby/site_ruby/1.8/mcollective/agents.rb:121:in `new'
/usr/lib/ruby/site_ruby/1.8/mcollective/agents.rb:121:in `dispatch'
/usr/lib/ruby/site_ruby/1.8/mcollective/runner.rb:82:in `agentmsg'
/usr/lib/ruby/site_ruby/1.8/mcollective/runner.rb:55:in `run'
/usr/lib/ruby/site_ruby/1.8/mcollective/runner.rb:50:in `loop'
/usr/lib/ruby/site_ruby/1.8/mcollective/runner.rb:50:in `run'
/usr/lib/ruby/site_ruby/1.8/mcollective/unix_daemon.rb:30:in `daemonize_runner'
/usr/lib/ruby/site_ruby/1.8/mcollective/unix_daemon.rb:13:in `daemonize'
/usr/lib/ruby/site_ruby/1.8/mcollective/unix_daemon.rb:5:in `fork'
/usr/lib/ruby/site_ruby/1.8/mcollective/unix_daemon.rb:5:in `daemonize'
/usr/lib/ruby/site_ruby/1.8/mcollective/unix_daemon.rb:20:in `daemonize_runner'
/usr/sbin/mcollectived:43
E, [2014-03-18T11:56:01.336954 #24456] ERROR -- : base.rb:29:in `run' Sending registration message failed: Stomp::Error::NoCurrentConnection
E, [2014-03-18T12:01:01.343415 #24456] ERROR -- : base.rb:29:in `run' Sending registration message failed: Stomp::Error::NoCurrentConnection
E, [2014-03-18T12:06:01.347218 #24456] ERROR -- : base.rb:29:in `run' Sending registration message failed: Stomp::Error::NoCurrentConnection
E, [2014-03-18T12:11:01.354069 #24456] ERROR -- : base.rb:29:in `run' Sending registration message failed: Stomp::Error::NoCurrentConnection
即使该机器在 RabbitMQ 服务器上仍然被列为消费者。
这里可能出了什么问题？
答案1
RabbitMQ 已disk_free_limit设置为1000000000。这导致 RabbitMQ 在 的可用磁盘空间低于 950MBrabbit.app时断开连接…/var