Coherence 3.4.2 JMX: invoking operation problem

Question

Hi,
we have run into two issues invoking JMX ModelMBean operations via JMX in Coherence 3.4.2
1. if a JMX operation has got any parameters /like doFoo(String a)/
it can not be invoked at all
this issue can be worked around by overriding RequiredJMXBean.invoke()
2. if any of a JMX operation's parameters is of a primitive type /doFoo(int i)/
a different error message is generated
this issue can not be worked around by overriding RequiredJMXBean.invoke()
because RequiredJMXBean.invoke() doesn't get invoked in this case
---here's sample code, a full project, 4 files total ---
/* please put this into src/main/java/foo/c34/Main.java */
package foo.c34;
import javax.management.MBeanParameterInfo;
import javax.management.modelmbean.ModelMBeanAttributeInfo;
import javax.management.modelmbean.ModelMBeanConstructorInfo;
import javax.management.modelmbean.ModelMBeanInfo;
import javax.management.modelmbean.ModelMBeanInfoSupport;
import javax.management.modelmbean.ModelMBeanNotificationInfo;
import javax.management.modelmbean.ModelMBeanOperationInfo;
import javax.management.modelmbean.RequiredModelMBean;
import com.tangosol.net.CacheFactory;
import com.tangosol.net.management.Registry;
* This sample program demonstrates Coherence 3.4.2 JMX difficulties with invoking methods
* Please invoke this program with
* -Dcom.sun.management.jmxremote
* otherwise bean "Coherence" won't be exposed in JMX console
* Not sure why this is necessary because this would imply this is no longer required
* http://java.sun.com/javase/6/docs/technotes/guides/management/agent.html
* ===
* To see the problem please try invoking method "operation1" and "operation2"
* via JMX console.
* Different error messages will be shown for each method
* To work around "operation1" problem please comment out this line
* final RequiredModelMBean rmb = new RequiredModelMBean();
* land uncomment the alternative one
* final RequiredModelMBean rmb = new WorkaroundRequiredModelMBean();
* You shall be able to invoke "operation1" then.
* Please note that you still won't be able to invoke "operation2"
public class Main {
   public static void main(final String[] args) throws Exception {
      configureProperties();
      Registry registry = CacheFactory.ensureCluster().getManagement();
      final RequiredModelMBean rmb = new RequiredModelMBean();
      //final RequiredModelMBean rmb = new WorkaroundRequiredModelMBean();
      final ModelMBeanInfo mbi = createModelMBeanInfo();
      rmb.setModelMBeanInfo(mbi);
      final Object managed = new Managed();
      rmb.setManagedResource(managed, "ObjectReference");
      final String name = registry.ensureGlobalName("type=A");
      registry.register(name, rmb);
      for (;;) {
         Thread.sleep(1000);
   private static ModelMBeanInfo createModelMBeanInfo() {
      final MBeanParameterInfo p1 = new MBeanParameterInfo("a", "java.lang.Integer", "a desc");
      final MBeanParameterInfo p2 = new MBeanParameterInfo("a", "int", "a desc");
      final ModelMBeanOperationInfo op1 = new ModelMBeanOperationInfo("operation1", "operation 1",
            new MBeanParameterInfo[]{p1}, "void", ModelMBeanOperationInfo.UNKNOWN);
      final ModelMBeanOperationInfo op2 = new ModelMBeanOperationInfo("operation2", "operation 2",
            new MBeanParameterInfo[]{p2}, "void", ModelMBeanOperationInfo.UNKNOWN);
      return new ModelMBeanInfoSupport("foo", "desc", new ModelMBeanAttributeInfo[0],
            new ModelMBeanConstructorInfo[0], new ModelMBeanOperationInfo[]{op1, op2},
                  new ModelMBeanNotificationInfo[0]);
   public static class Managed {
      public void operation1(Integer p1) {
         System.out.println("operation1 invoked p1=" + p1);
      public void operation2(int p2) {
         System.out.println("operation2 invoked p2=" + p2);
   private static void configureProperties() {
      System.setProperty("tangosol.coherence.cacheconfig", "a-cache-config.xml");
      System.setProperty("tangosol.coherence.ttl", "0");
      System.setProperty("tangosol.coherence.log", "jdk");
      System.setProperty("tangosol.coherence.log.level", "9");
      System.setProperty("tangosol.coherence.clusterport", "5878");
      System.setProperty("com.sun.management.jmxremote", "");
      System.setProperty("tangosol.coherence.management", "all");
      System.setProperty("tangosol.coherence.management.remote", "true");
/* please put this into src/main/java/foo/c34/WorkaroundRequiredModelMBean.java */
package foo.c34;
import javax.management.MBeanException;
import javax.management.ReflectionException;
import javax.management.RuntimeOperationsException;
import javax.management.modelmbean.RequiredModelMBean;
public class WorkaroundRequiredModelMBean extends RequiredModelMBean {
   public WorkaroundRequiredModelMBean() throws MBeanException, RuntimeOperationsException {
   public Object invoke(final String opName, final Object[] params,
         final String[] signature) throws MBeanException, ReflectionException {
      final String[] fakeSignature = fakeSignature(opName);
      return super.invoke(opName, params, fakeSignature);
   protected String[] fakeSignature(final String methodName) {
      if (methodName.equals("operation1")) {
         return new String[]{"java.lang.Integer"};
      if (methodName.equals("operation2")) {
         return new String[]{"int"};
      return new String[0];
<!DOCTYPE cache-config SYSTEM "cache-config.dtd">
<!-- please put this into src/main/resources/a-cache-config.xml -->
<cache-config>  
   <caching-scheme-mapping>
      <cache-mapping>
         <cache-name>*</cache-name>
         <scheme-name>AAA</scheme-name>
      </cache-mapping>
   </caching-scheme-mapping>
   <caching-schemes>
      <local-scheme>
         <scheme-name>AAALocal</scheme-name>
         <autostart>true</autostart>
         <high-units>0</high-units>
      </local-scheme>
      <distributed-scheme>
         <scheme-name>AAA</scheme-name>
         <service-name>AAACache</service-name>
         <backing-map-scheme>
            <local-scheme>
               <scheme-ref>AAALocal</scheme-ref>
            </local-scheme>
         </backing-map-scheme>
         <autostart>true</autostart>
      </distributed-scheme>
   </caching-schemes>
</cache-config>
<!-- please put this into pom.xml at project root level -->
<project xmlns="http://maven.apache.org/POM/4.0.0"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>foo-group</groupId>
   <artifactId>c34-jmx-demo</artifactId>
   <name>Coherence 34 JMX Demo</name>
   <version>0.0.1-SNAPSHOT</version>
   <description>Demonstrate Coherece 3.4 JMX Difficulties</description>
   <dependencies>
      <dependency>
         <groupId>com.oracle</groupId>
         <artifactId>coherence</artifactId>
         <version>3.4.2</version>
      </dependency>
   </dependencies>
</project>

Answer 1

Hi Dave,
I wanted to let you know that we do not have an answer yet but we are looking into it. Thanks!
Out of curiosity what type of impact is this having with your application?We've managed to temporarily work around both of the issues.
Of course we shall be very glad to remove the work-arounds when it becomes possible.