本地JMX調用失敗，ClassCastException

Question

我想使用下面的簡單代碼在本地調用JMX服務。它在JConsole中可以正常工作，但是在命令行下它會在粘貼代碼的最後一行拋出異常。

String serviceURL = "service:jmx:rmi:///jndi/rmi://localhost:" + configuration.getJmxPort(); 
    String[] credentials = new String[]{configuration.getUsername(), configuration.getPassword()}; 
    Map<String, String[]> attributes = new HashMap<String, String[]>(); 
    attributes.put("jmx.remote.credentials", credentials); 

    JMXServiceURL jmxUrl = new JMXServiceURL(serviceURL); 
    jmxCon = JMXConnectorFactory.connect(jmxUrl, attributes); 

堆棧跟蹤看起來是這樣的：

java.lang.ClassCastException: com.sun.jndi.rmi.registry.RegistryContext cannot be cast to javax.management.remote.rmi.RMIServer 
    at javax.management.remote.rmi.RMIConnector.narrowJRMPServer(RMIConnector.java:1897) 
    at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1892) 
    at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1856) 
    at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:257) 
    at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:248) 
    at com.aaa.aaa.aaa.jmx.AaaJmxClient.main(AaaJmxClient.java:36) 

Answer 1

我覺得JMX服務的URL應該是 -

String serviceURL = "service:jmx:rmi:///jndi/rmi://localhost:" + configuration.getJmxPort() + "/jmxrmi";