ActiveMQ 2 ActiveMQ ReplicationLevelDB

这里只是简述我的配置以及碰到的问题.

<broker xmlns="http://activemq.apache.org/schema/core" brokerName="broker"
...
        <managementContext>
            <managementContext createConnector="true"/>
        </managementContext>

...
<persistenceAdapter>
                <!-- <kahaDB directory="${activemq.data}/kahadb"/> -->
                <!-- <jdbcPersistenceAdapter  dataSource="#mysql-ds" /> -->
                <replicatedLevelDB
                        directory="${activemq.data}/leveldb"
                        replicas="3"
                        bind="tcp://0.0.0.0:0"
                        zkAddress="192.168.1.210:2181,192.168.1.211:2181,192.168.1.212:2181"
                        zkPath="/activemq/leveldb-stores"
                        hostname="192.168.1.210"
                        sync="local_disk"
                />
</persistenceAdapter>

...
</broker>

要求使用failover协议

引用

failover:(tcp://192.168.1.210:61616,tcp://192.168.1.211:61616,tcp://192.168.1.212:61616)

问题一:
关闭ActiveMQ时异常

引用

Connecting to JMX URL: service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi
ERROR: java.lang.RuntimeException: Failed to execute stop task. Reason: java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: java.net.ConnectException: Connection refused]

将 <managementContext createConnector="true"/> 改为 true,默认是false.

问题二:
测试时使用了3个ActiveMQ集群Master-Slave, 比如我的是 210, 211, 212 , 如果正在使用 210为Master(测试方法为访问3台机器的 8161端口, 哪个可以访问,当前哪个是 Master),关闭 210 ,会在 MessageProducer.send 方法时阻塞, 无法正常工作,当210再次启动时, MessageProducer.send方法不再阻塞, 但 Master 可能会变成其他的node,比如 211.

解决办法是参照这里
http://blog.csdn.net/srnpr/article/details/17370813?reload
http://www.cnblogs.com/fuhaots2009/p/3478413.html
这两篇是一样的,不知道谁是原创,都粘贴了.

加上 sync="local_disk" 参数配置

引用

sync

default value: quorum_mem

Controls where updates are reside before being considered complete. This setting is a comma separated list of the following options: local_mem, local_disk, remote_mem, remote_disk, quorum_mem, quorum_disk. If you combine two settings for a target, the stronger guarantee is used. For example, configuring local_mem, local_disk is the same as just using local_disk. quorum_mem is the same as local_mem, remote_mem and quorum_disk is the same as local_disk, remote_disk

详细配置请参见: http://activemq.apache.org/replicated-leveldb-store.html