Question

使用ActiveMQ 5.9.0，我有以下代理配置：

<amq:broker id="broker" useShutdownHook="false" persistent="true">
    <amq:persistenceAdapter>
        <amq:jdbcPersistenceAdapter dataSource="#dataSource">
        </amq:jdbcPersistenceAdapter>
    </amq:persistenceAdapter>
    <amq:transportConnectors>
        <amq:transportConnector uri="${broker.url}" />
    </amq:transportConnectors>
</amq:broker>

如果启动代理时数据库中已有消息，则会出现异常：

java.lang.ClassCastException： org.apache.activemq.command.WireFormatInfo无法强制转换为 org.apache.activemq.command.Message at org.apache.activemq.store.jdbc.JDBCPersistenceAdapter.getLastMessageBrokerSequenceId（JDBCPersistenceAdapter.java:265）在 org.apache.activemq.broker.region.DestinationFactoryImpl.getLastMessageBrokerSequenceId（DestinationFactoryImpl.java:147）在 org.apache.activemq.broker.region.RegionBroker。（RegionBroker.java:128）在 org.apache.activemq.broker.jmx.ManagedRegionBroker。（ManagedRegionBroker.java:111）在 org.apache.activemq.broker.BrokerService.createRegionBroker（BrokerService.java:2172）在 org.apache.activemq.broker.BrokerService.createRegionBroker（BrokerService.java:2165）在 org.apache.activemq.broker.BrokerService.createBroker（BrokerService.java:2122）在 org.apache.activemq.broker.BrokerService.getBroker（BrokerService.java:906）在 org.apache.activemq.broker.BrokerService.getAdminConnectionContext（BrokerService.java:2393）在 org.apache.activemq.broker.BrokerService.startVirtualConsumerDestinations（BrokerService.java:2533）在 org.apache.activemq.broker.BrokerService.startDestinations（BrokerService.java:2384）在 org.apache.activemq.broker.BrokerService.doStartBroker（BrokerService.java:640）在 org.apache.activemq.broker.BrokerService.startBroker（BrokerService.java:632）在 org.apache.activemq.broker.BrokerService.start（BrokerService.java:568）在 org.apache.activemq.broker.BrokerService.autoStart（BrokerService.java:524）在 org.apache.activemq.broker.BrokerService.postConstruct（BrokerService.java:511）

在我看来，用于编组邮件的格式可能与解组时使用的格式不同。知道为什么会这样吗？

Answer 1

问题是oracle驱动程序版本。从数据库中读取blob列时，数据已损坏。问题很难重现（在收到消息时停止应用程序），因此切换到amq 5.5.0是误报。我使用ojdbc 10.1.0.2.0并切换到ojdbc6 11.2.0.3解决了这个问题。

使用jdbcPersistenceAdapter重新启动嵌入式activeMQ代理时出现异常

1 个答案: