A broker that shuts down as part of loosing its persistence store is not unregistered from Zookeeper.

Using Fabric deploy two broker containers that both use the same config: broker.xml <beans xmlns= "http: //www.springframework.org/schema/beans" xmlns:xsi= "http: //www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http: //www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http: //activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd"> <bean class= "org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" > <property name= "properties" > <bean class= "org.fusesource.mq.fabric.ConfigurationProperties" /> </property> </bean> <broker useJmx= " true " brokerName= "jdbcBroker2" restartAllowed= " false " xmlns= "http: //activemq.apache.org/schema/core" > <ioExceptionHandler> <jDBCIOExceptionHandler stopStartConnectors= " false " /> </ioExceptionHandler> <persistenceAdapter> <jdbcPersistenceAdapter dataSource= "#mysql-ds" lockKeepAlivePeriod= "1000" > <locker> <lease-database-locker lockAcquireSleepInterval= "2000" /> </locker> </jdbcPersistenceAdapter> </persistenceAdapter> <transportConnectors> <transportConnector name= "openwire" uri= "tcp: //0.0.0.0:61616" /> </transportConnectors> </broker> <!-- MySql DataSource Sample Setup --> <bean id= "mysql-ds" class= "org.apache.commons.dbcp.BasicDataSource" destroy-method= "close" > <property name= "driverClassName" value= "com.mysql.jdbc.Driver" /> <property name= "url" value= "jdbc:mysql: //localhost/activemq?relaxAutoCommit= true " /> <property name= "username" value= "root" /> <property name= "password" value=""/> <property name= "maxActive" value= "200" /> <property name= "poolPreparedStatements" value= " true " /> </bean> </beans> org.fusesource.mq.fabric.server-broker.properties connectors=openwire broker-name=amq-jdbc config=zk\:/fabric/configs/versions/1.2/profiles/amq-jdbc/broker.xml group=masterSlaveTest standby.pool= default Watch the master broker connecting to the database and the slave broker trying to lock the Zookeeper node. run a cluster-list to verify the setup is correct Kill the underlying database and see the master broker shutting down run a cluster-list again and note the master remains registered in Zookeeper restart the underlying db. Note that no broker becomes the master