[GEODE-5455] ClassCastException in MemberMBean.showOSMetrics, OSMetrics is not reconstructible from CompositeData

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.0
• Fix Version/s: 1.7.0
• Component/s: jmx
• Labels: pull-request-available
• Assignee: Ken Howe
• Reporter: Ken Howe
• Created: 19/Jul/18 14:58
• Updated: 03/Oct/18 21:37
• Resolved: 26/Sep/18 15:37

Description

The following code snippet throws

Exception in thread "main" java.lang.ClassCastException: javax.management.openmbean.CompositeDataSupport cannot be cast to org.apache.geode.management.OSMetrics at com.sun.proxy.$Proxy0.showOSMetrics(Unknown Source) 

  public static MBeanServerConnection getLocalMBeanServerConnectionStatic(int pid) {
    try {
      String address = ConnectorAddressLink.importFrom(pid);
      JMXServiceURL jmxUrl = new JMXServiceURL(address);
      return JMXConnectorFactory.connect(jmxUrl).getMBeanServerConnection();
    } catch (IOException e) {
      throw new RuntimeException(
          "Of course you still have to implement a good connection handling");
    }
  }

  public static void main(String[] args) throws IOException,
      MalformedObjectNameException, InstanceNotFoundException, ReflectionException {
    MBeanServerConnection mbeanServerConnection = getLocalMBeanServerConnectionStatic(127510);
    ObjectName mbeanName = new ObjectName("GemFire:type=Member,member=server1");
    MemberMXBean
        memberbeanInstance =
        (MemberMXBean) MBeanServerInvocationHandler
            .newProxyInstance(mbeanServerConnection, mbeanName, MemberMXBean.class, Boolean.TRUE);
    System.out.println(Arrays.toString(memberbeanInstance.listRegions()));
    OSMetrics cdOSMetrics = memberbeanInstance.showOSMetrics();
    //.....
  }

Issue Links

• links to: GitHub Pull Request #2169