exception - 通过 JMX 访问 Apache ActiveMQ 抛出异常

Question

我正在使用全新的 ActiveMQ 5.8.0 安装，其中队列中有一条名为“testing”的消息。我还替换了 bin/activemq 中的 ACTIVEMQ_SUNJMX 行以启用 JMX:

ACTIVEMQ_SUNJMX_START="-Dcom.sun.management.jmxremote.port=1099 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"

然后我通过以下代码查询 JMX:

    try {
        JMXConnector connector = JMXConnectorFactory.connect(new JMXServiceURL("service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi"));
        connector.connect();
        MBeanServerConnection connection = connector.getMBeanServerConnection();

        ObjectName mbeanName = new ObjectName("org.apache.activemq:BrokerName=localhost,Type=Broker");
        BrokerViewMBean mbean = MBeanServerInvocationHandler.newProxyInstance(connection, mbeanName, BrokerViewMBean.class, true);

        System.out.println("Id:" + mbean.getBrokerId()); // here the exception will be thrown
    }
    catch (Exception x) {
        x.printStackTrace();
    }

访问mbean时抛出异常。

java.lang.reflect.UndeclaredThrowableException
    at $Proxy0.getBrokerId(Unknown Source)
    at testing.TestJmx.main(TestJmx.java:25)
Caused by: javax.management.InstanceNotFoundException: org.apache.activemq:BrokerName=localhost,Type=Broker
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1095)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:643)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:668)
    at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1424)
    at javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:89)
    at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1292)
    at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1380)
    at javax.management.remote.rmi.RMIConnectionImpl.getAttribute(RMIConnectionImpl.java:621)
    at sun.reflect.GeneratedMethodAccessor30.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)
    at sun.rmi.transport.Transport$1.run(Transport.java:177)
    at sun.rmi.transport.Transport$1.run(Transport.java:174)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
    at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:273)
    at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:251)
    at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:160)
    at com.sun.jmx.remote.internal.PRef.invoke(Unknown Source)
    at javax.management.remote.rmi.RMIConnectionImpl_Stub.getAttribute(Unknown Source)
    at javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.getAttribute(RMIConnector.java:901)
    at javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:280)
    ... 2 more

我检查了该端口正在监听，VisualVM 还向我显示了 mbean，想法？

Answer 1

bean 名称已更改的事实记录在 5.8.0 release page 中。

所以你的 ObjectName 应该采用以下形式:

    ObjectName mbeanName = new ObjectName("org.apache.activemq:type=Broker,brokerName=localhost");