5 Replies Latest reply on Aug 29, 2005 11:12 AM by Erik Sliman

    Remote call between isolated EARs

    Erik Jensen Newbie

      Hi I am new to JBoss and have developed two seperate applications that communicate via remote calls. In order to test the application I would like to run both EAR applications on the same server.

      I have searched the forums for a solution but found nothing. I have followed the instructions in the documentation at,
      But all I get is a ClassCastException. If I remove the ejb-refs I get a,
      javax.ejb.EJBException: Invalid invocation, check your deployment packaging, method=public abstract uk.co......

      Can anyone shed any light on what is going on here, I am at my wits end with it.

      Thanks in advance,


        • 1. Re: Remote call between isolated EARs
          Erik Jensen Newbie

          Forgot to say, I am using JBoss 4.0.1

          • 2. Re: Remote call between isolated EARs
            Juha Lindfors Master

            What exactly are you trying to do? Deploying two ears on an application server is not a problem. If they are the same ear then you need to resolve any global resource conflicts they might introduce (such as global JNDI lookup names). Only if you suspect you need to use different class versions in the ears should you need to look at classloader isolation.

            • 3. Re: Remote call between isolated EARs
              Taras Bulba Newbie

              I have the same problem with 4.0.2 version. However 4.0.0 and 3.2.4 works fine.
              Can anyone from JBoss explain why?

              • 4. Re: Remote call between isolated EARs
                Jens Vagts Newbie

                We have the same problem (Invalid Invocation ...) on calling a home.create() on a SLSB in another ear :( (JBoss 4.0.1)

                BTW: We want to develop components independently within several ears and connect them through JNDI. We expected this should be simplest task for a J2EE server....But we are new to J2EE/JBoss and looking for the wrong solution?

                Has anybody an idea?

                ejensen, does your problem beeing solved?

                I'm realy stumped...


                • 5. Re: Remote call between isolated EARs
                  Erik Sliman Apprentice

                  We're having the same problem in 4.0.2. We need to use remote invocation between ears because the ears may or may not be deployed in the same JBoss instance at a customer site.

                  I don't want to use external references in the ejb-jar.xml, because we read our configuration in and prefer to dynamically construct the JNDI lookup at runtime.

                  The code is the same as that used by one of our standalone Java apps that connects successfully, as well as another ear-to-ear case that works.

                  The difference here is that the client is an MDB. The Ear it's invoking containing a stateless session bean is isolated. If the MDB's ear is not isolated, it produces the Invalid invocation. If the ear with the MDB is isolated, it produces:

                  18:14:22,897 WARN [verifier] EJB spec violation:
                  Bean : SubscriberBatchBean
                  Section: 15.7.4
                  Warning: The message driven bean must declare one onMessage() method.
                  18:14:22,897 ERROR [MainDeployer] could not create deployment: file:/C:/Programs/JBoss/jboss-4.0.2_n
                  org.jboss.deployment.DeploymentException: Verification of Enterprise Beans failed, see above for err
                  or messages.
                   at org.jboss.ejb.EJBDeployer.create(EJBDeployer.java:553)
                   at org.jboss.deployment.MainDeployer.create(MainDeployer.java:918)
                   at org.jboss.deployment.MainDeployer.create(MainDeployer.java:910)
                   at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:774)
                   at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:738)
                   at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
                   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
                   at java.lang.reflect.Method.invoke(Method.java:585)
                   at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
                   at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
                   at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:121)
                   at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
                   at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterce
                   at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
                   at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
                   at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
                   at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
                   at $Proxy8.deploy(Unknown Source)
                   at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:325)
                   at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:501)
                   at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeplo
                   at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentSca
                   at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:272)
                   at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:222)

                  It's worth noting that we're using the prefix deployment sorter, which is not the default. This shouldn't matter, but it's possible that it invokes different code. You can see that it's part of the stacktrace above.