9 Replies Latest reply on May 7, 2009 12:22 PM by erkin kanlioglu

    Communication between nodes

    erkin kanlioglu Newbie

      Hi,

      What is the best way of communicating between jboss nodes?
      I have used HAServiceMBeanSupport for cluster-wide notifications but this time I need to be able to send messages to a specific node/nodes. Notifications can be addressed to specific node by providing another field specifying node name in the notification but how effective would this solution be?

      Is there any possible way to access underlying JChannel from HAPartition so I will be able to use following send method?

      public void send(Address dst, Address src, java.io.Serializable obj)

      Thanks for your help.

        • 1. Re: Communication between nodes
          Brian Stansberry Master

          No, you can't get access to the JChannel, and if you did that send() call wouldn't work. HAServiceMBeanSupport provides a callMethodOnPartition method that lets you invoke an RPC on the group; you could pass the target node as a param.

          If you can use AS 5.1 (now in CR1 release) HAPartition also exposes methods for making RPCs solely on target nodes:

          /**
          * Calls method synchronously on target node only.
          * @param serviceName Name of the target service name on which calls are de-multiplexed
          * @param methodName name of the Java method to be called on remote services
          * @param args array of Java Object representing the set of parameters to be
          * given to the remote method
          * @param types The types of the parameters
          * node of the partition or only on remote nodes
          * @param targetNode is the target of the call
          * @return the value returned by the target method
          * @throws Exception Throws if a communication exception occurs
          */
          public Object callMethodOnNode(String serviceName, String methodName,
          Object[] args, Class[] types, long methodTimeout, ClusterNode targetNode) throws Throwable;

          /**
          * Calls method on target node only.
          * @param serviceName Name of the target service name on which calls are de-multiplexed
          * @param methodName name of the Java method to be called on remote services
          * @param args array of Java Object representing the set of parameters to be
          * given to the remote method
          * @param types The types of the parameters
          * node of the partition or only on remote nodes
          * @param targetNode is the target of the call
          *
          * @throws Exception Throws if a communication exception occurs
          */
          public void callAsyncMethodOnNode(String serviceName, String methodName,
          Object[] args, Class[] types, long methodTimeout, ClusterNode targetNode) throws Throwable;

          There's no convenience method to expose that via HAServiceMBeanSupport, but that's not hard for you to implement.

          • 2. Re: Communication between nodes
            erkin kanlioglu Newbie

            Thanks for your reply. Quickest option for me to use AS5.1 as AS5.0 is already in place.

            • 3. Re: Communication between nodes
              erkin kanlioglu Newbie

              Hi All

              I'm struggling to deploy singleton jboss service. Can you provide some feedback what it is wrong with following config file?

              The problem is that I'm not able to set TargetName attribute of HASingletonController.

              Note: I'm using jboss-eap-5.0--> Supported Alpha Version


              11:48:55,438 ERROR [AbstractKernelController] Error installing to Configured: name=xyz:service=TestServiceHASingletonController state=Instantiated mode=Manual requiredState=Configured
              java.lang.RuntimeException: Exception setting attribute TargetName on mbean xyz:service=TestServiceHASingletonController

              Caused by: javax.management.InvalidAttributeValueException: Set attribute has class class javax.management.ObjectName loaded from null that is not assignable to attribute class class javax.management.ObjectName loaded from BaseClassLoader@15b9a0c

              public interface TestServiceMBean extends HAServiceMBean {
              
               public void startSingleton();
              
               public void stopSingleton();
              
              }
              
              
              public class TestService extends HAServiceMBeanSupport
               implements TestServiceMBean {
              
               private static Logger logger = Logger.getLogger(
               TestService.class);
              
              
               @Override
               public void startSingleton() {
               logger.info("Start Singleton Service");
               }
              
               @Override
               public void stopSingleton(){
               logger.info("Stop Singleton Service");
               }
              
               @Override
               protected void createService() throws Exception {
               super.createService();
               logger.info("Create Service");
               }
              
               @Override
               protected void startService() throws Exception {
               super.startService();
               logger.info("Start Service");
               }
              
               @Override
               protected void stopService() throws Exception {
               super.stopService();
               logger.info("Stop Service");
               }
              
               @Override
               protected void destroyService() throws Exception {
               super.destroyService();
              
               logger.info("Destroy Service");
               }
              }
              
              <?xml version="1.0" encoding="UTF-8" ?>
              <server>
               <mbean
               code="xyz.TestService"
               name="xyz:service=TestService">
               <!--
               I tried to inject HAPartition like below as setting ClusteredPartition is deprecated,
               unfortunately it didnt work
              
               <depends>HAPartition</depends>
               <property name="HAPartition"><inject bean="HAPartition"/></property>
               -->
              
               <depends optional-attribute-name="ClusterPartition" proxy-type="attribute">
               jboss:partition=${jboss.partition.name:DefaultPartition},service=HAPartition
               </depends>
               </mbean>
              
               <mbean code="org.jboss.ha.singleton.HASingletonController"
               name="xyz:service=TestServiceHASingletonController">
               <depends optional-attribute-name="ClusterPartition" proxy-type="attribute">
               jboss:partition=${jboss.partition.name:DefaultPartition},service=HAPartition
               </depends>
               <depends optional-attribute-name="TargetName">
               xyz:service=TestService
               </depends>
               <attribute name="TargetStartMethod">startSingleton</attribute>
               <attribute name="TargetStopMethod">stopSingleton</attribute>
               </mbean>
              </server>
              




              • 4. Re: Communication between nodes
                Brian Stansberry Master

                Do you still see this problem with community AS 5.1.0.CR1?

                The injection of the HAPartition isn't working because you're using -jboss-beans.xml syntax in a -service.xml. It should be:

                <attributed name="HAPartition"><inject bean="HAPartition"/></attribute>


                The element name is "attribute" not "property".

                • 5. Re: Communication between nodes
                  erkin kanlioglu Newbie

                  Thanks again Brain. I have tried with 5.0.1 GA and JBoss EAP 5.0.0.

                  To try on release candidate didnt even cross my mind, I apologise for that.

                  • 6. Re: Communication between nodes
                    Brian Stansberry Master

                    No need to apologize. It might still be there, but it's in an area in active development that's outside of my regular involvement. So first thing to do before doing deep analysis is to check if it's already fixed. :)

                    • 7. Re: Communication between nodes
                      erkin kanlioglu Newbie

                      Hey Brain

                      still no luck after downloading and testing on jBoss 5.1.0CR1. You can find full stack trace below.

                      16:05:02,203 ERROR [AbstractKernelController] Error installing to Real: name=vfszip:/servers/jboss-5.1.0.CR1/server/production/deploy/Test.ear/ state=PreReal mode=Manual requiredState=Real
                      org.jboss.deployers.spi.DeploymentException: Error deploying: xyz:service=TestServiceHASingletonController
                       at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49)
                       at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:118)
                       at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:46)
                       at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62)
                       at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
                       at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
                       at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
                       at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
                       at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178)
                       at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1210)
                       at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
                       at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
                       at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
                       at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
                       at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
                       at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
                       at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
                       at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
                       at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781)
                       at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:702)
                       at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
                       at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:338)
                       at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:231)
                       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
                       at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
                       at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
                       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
                       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
                       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
                       at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
                       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
                       at java.lang.Thread.run(Thread.java:619)
                      Caused by: java.lang.RuntimeException: Exception setting attribute TargetName on mbean xyz:service=TestServiceHASingletonController
                       at org.jboss.system.ServiceConfigurator.configure(ServiceConfigurator.java:170)
                       at org.jboss.system.ServiceConfigurator.configure(ServiceConfigurator.java:114)
                       at org.jboss.system.microcontainer.ConfigureAction.installAction(ConfigureAction.java:58)
                       at org.jboss.system.microcontainer.ConfigureAction.installAction(ConfigureAction.java:42)
                       at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62)
                       at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71)
                       at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
                       at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
                       at org.jboss.system.microcontainer.ServiceControllerContext.install(ServiceControllerContext.java:286)
                       at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
                       at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
                       at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
                       at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
                       at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
                       at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
                       at org.jboss.system.ServiceController.doChange(ServiceController.java:688)
                       at org.jboss.system.ServiceController.install(ServiceController.java:274)
                       at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:90)
                       ... 30 more
                      Caused by: javax.management.InvalidAttributeValueException: Set attribute has class class javax.management.ObjectName loaded from null that is not assignable to attribute class class javax.management.ObjectName loaded from BaseClassLoader@14d1552{vfszip:/servers/jboss-5.1.0.CR1/server/production/deploy/Test.ear/}
                       at org.jboss.mx.interceptor.ModelMBeanAttributeInterceptor.checkAssignable(ModelMBeanAttributeInterceptor.java:229)
                       at org.jboss.mx.interceptor.ModelMBeanAttributeInterceptor.invoke(ModelMBeanAttributeInterceptor.java:88)
                       at org.jboss.mx.interceptor.PersistenceInterceptor.invoke(PersistenceInterceptor.java:76)
                       at org.jboss.mx.server.Invocation.invoke(Invocation.java:90)
                       at org.jboss.mx.server.AbstractMBeanInvoker.setAttribute(AbstractMBeanInvoker.java:461)
                       at org.jboss.mx.server.MBeanServerImpl.setAttribute(MBeanServerImpl.java:617)
                       at org.jboss.system.ServiceConfigurator.configure(ServiceConfigurator.java:166)
                       ... 47 more
                      
                      
                      
                      


                      • 8. Re: Communication between nodes
                        Brian Stansberry Master

                        Do you package a copy of the javax.management.ObjectName class in Test.ear?

                        Please outline the contents of Test.ear.

                        • 9. Re: Communication between nodes
                          erkin kanlioglu Newbie

                          Hey Brian

                          Thanks a lot... jmxri was in the ear file. After removing, everything worked properly...