使用zookeeper在activemq cms MessageProducer.send中等待五秒钟

我正在测试

在带有本地LevelDB存储的独立ActiveMQ上运行时，每个

producer.send（message）

调用大约需要1毫秒。在我的复制设置中，有3个zookeepers和3个ActiveMQ代理，

producer.send（message）

需要5秒以上的时间才能返回！即使使用

中的

sync=“local_mem”

，也会发生这种情况。它总是刚好超过5秒，所以似乎有一些奇怪的等待/超时

这有什么意义吗

无论我是将brokerurl设置为

故障转移：（）

还是仅仅

tcp://brokerX

，其中brokerX位于复制的LevelDB设置中。在brokerX web ui（hawtio）中发送消息没有明显的延迟。如果我更改为

tcp://brokerY

，其中broker是另一个相同的broker，

设置为

，而不是

，我们在每次发送时降低了1毫秒

改变时间等没有什么区别

下面是调试日志。如您所见，“发送到队列”之间间隔5秒，但缩放速度很快

2014-02-19 10:45:34,719 | DEBUG | Handling request for path /jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-227
2014-02-19 10:45:34,724 | DEBUG | localhost Message ID:<hostname>-57776-1392803129562-0:0:1:1:2 sent to queue://IO_stab_test_Q | org.apache.activemq.broker.region.Queue | ActiveMQ Transport: tcp:///<ip address>:54727@61616
2014-02-19 10:45:34,725 | DEBUG | IO_stab_test_Q toPageIn: 1, Inflight: 1, pagedInMessages.size 1, enqueueCount: 27, dequeueCount: 25 | org.apache.activemq.broker.region.Queue | ActiveMQ BrokerService[localhost] Task-20
2014-02-19 10:45:34,731 | DEBUG | Handling request for path /jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-222
2014-02-19 10:45:34,735 | DEBUG | Got ping response for sessionid: 0x244457fceb80003 after 0ms | org.apache.zookeeper.ClientCnxn | main-SendThread(<hostname>:2181)
2014-02-19 10:45:34,867 | DEBUG | Handling request for path /jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-222
2014-02-19 10:45:35,403 | DEBUG | Got ping response for sessionid: 0x244457fceb80003 after 0ms | org.apache.zookeeper.ClientCnxn | main-SendThread(<hostname>:2181)
2014-02-19 10:45:35,634 | DEBUG | Handling request for path /jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-227
2014-02-19 10:45:36,071 | DEBUG | Got ping response for sessionid: 0x244457fceb80003 after 0ms | org.apache.zookeeper.ClientCnxn | main-SendThread(<hostname>:2181)
2014-02-19 10:45:36,740 | DEBUG | Got ping response for sessionid: 0x244457fceb80003 after 0ms | org.apache.zookeeper.ClientCnxn | main-SendThread(<hostname>:2181)
2014-02-19 10:45:37,410 | DEBUG | Got ping response for sessionid: 0x244457fceb80003 after 0ms | org.apache.zookeeper.ClientCnxn | main-SendThread(<hostname>:2181)
2014-02-19 10:45:38,088 | DEBUG | Got ping response for sessionid: 0x244457fceb80003 after 8ms | org.apache.zookeeper.ClientCnxn | main-SendThread(<hostname>:2181)
2014-02-19 10:45:38,623 | DEBUG | Handling request for path /jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-222
2014-02-19 10:45:38,750 | DEBUG | Got ping response for sessionid: 0x244457fceb80003 after 0ms | org.apache.zookeeper.ClientCnxn | main-SendThread(<hostname>:2181)
2014-02-19 10:45:39,420 | DEBUG | Got ping response for sessionid: 0x244457fceb80003 after 0ms | org.apache.zookeeper.ClientCnxn | main-SendThread(<hostname>:2181)
2014-02-19 10:45:39,735 | DEBUG | localhost Message ID:<hostname>-57776-1392803129562-0:0:1:1:3 sent to queue://IO_stab_test_Q | org.apache.activemq.broker.region.Queue | ActiveMQ Transport: tcp:///<ip address>:54727@61616
2014-02-19 10:45:39,737 | DEBUG | IO_stab_test_Q toPageIn: 1, Inflight: 2, pagedInMessages.size 2, enqueueCount: 28, dequeueCount: 25 | org.apache.activemq.broker.region.Queue | ActiveMQ BrokerService[localhost] Task-24
2014-02-19 10:45:40,090 | DEBUG | Got ping response for sessionid: 0x244457fceb80003 after 0ms | org.apache.zookeeper.ClientCnxn | main-SendThread(<hostname>:2181)

2014-02-19 10:45:34719 |调试|处理路径请求/jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-227
2014-02-19 10:45:34724调试本地主机消息ID:-57776-1392803129562-0:0:1:1:2发送到queue://IO_stab_test_Q |org.apache.activemq.broker.region.Queue | activemq传输：tcp://:54727@61616
2014-02-19 10:45:34725 | DEBUG | IO | stab | u test | Q toPageIn:1，机上：1，pagedInMessages.size 1，排队数：27，出队数：25 | org.apache.activemq.broker.region.Queue | activemq BrokerService[localhost]Task-20
2014-02-19 10:45:34731 |调试|处理路径请求/jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-222
2014-02-19 10:45:34735 |调试|在0毫秒后得到sessionid:0x244457fceb80003的ping响应| org.apache.zookeeper.ClientCnxn |主发送线程（：2181）
2014-02-19 10:45:34867 |调试|处理路径请求/jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-222
2014-02-19 10:45:35403 |调试|在0毫秒后获得sessionid:0x244457fceb80003的ping响应| org.apache.zookeeper.ClientCnxn |主发送线程（：2181）
2014-02-19 10:45:35634 |调试|处理路径请求/jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-227
2014-02-19 10:45:36071 |调试|在0毫秒后获得会话ID:0x244457fceb80003的ping响应| org.apache.zookeeper.ClientCnxn |主发送线程（：2181）
2014-02-19 10:45:36740调试获得会话ID:0x244457fceb80003 0毫秒后的ping响应org.apache.zookeeper.ClientCnxn主发送线程（：2181）
2014-02-19 10:45:37410 |调试|在0毫秒后获得sessionid:0x244457fceb80003的ping响应| org.apache.zookeeper.ClientCnxn |主发送线程（：2181）
2014-02-19 10:45:38088 |调试|在8ms | org.apache.zookeeper.ClientCnxn |主发送线程（：2181）后获得sessionid:0x244457fceb80003的ping响应
2014-02-19 10:45:38623 |调试|处理路径请求/jolokia | io.hawt.web.AuthenticationFilter | qtp1217711018-222
2014-02-19 10:45:38750 |调试|在0毫秒后获得会话ID:0x244457fceb80003的ping响应| org.apache.zookeeper.ClientCnxn |主发送线程（：2181）
2014-02-19 10:45:39420 |调试|在0毫秒后获得会话ID:0x244457fceb80003的ping响应| org.apache.zookeeper.ClientCnxn |主发送线程（：2181）
2014-02-19 10:45:39735调试本地主机消息ID:-57776-1392803129562-0:0:1:1:3发送到queue://IO_stab_test_Q |org.apache.activemq.broker.region.Queue | activemq传输：tcp://:54727@61616
2014-02-19 10:45:39737 | DEBUG | IO | stab | test | Q toPageIn:1，机上：2，pagedInMessages.size 2，排队数：28，出队数：25 | org.apache.activemq.broker.region.Queue | activemq BrokerService[localhost]Task-24
2014-02-19 10:45:40090 |调试|在0毫秒后获得会话ID:0x244457fceb80003的ping响应| org.apache.zookeeper.ClientCnxn |主发送线程（：2181）

设置队列预取=0

关于我们情况的一些背景

---

我们的消息大小相当小（我将首先针对5.10-SNAPSHOT进行测试，因为自5.9.0发布以来，我们对LevelDB进行了大量的修复。从发布到快照并不总是一个选项。这种延迟也会对我们产生负面影响，但我们无法在生产中运行SNAPSHOT。