[jboss-user] [Persistence, JBoss/CMP, Hibernate, Database] - sharing persistence-context among multiple ejb-jars in an ea

[syed.jamil]

In order to share persistence-context among ejb-jars in an ear file, I put persisence.xml file in the META-INF directory of each and every ejb-jar files.  However, during deployment of JBoss 5.1GA, I get the following exception:


00:43:24,297 WARN  [AbstractDeploymentContext] Unable to register deployment mbean org.jboss.metadata.jpa.spec.PersistenceUnitMetaData.scan
javax.management.InstanceAlreadyExistsException: jboss.deployment:id="org.jboss.metadata.jpa.spec.PersistenceUnitMetaData.scan",type=Component already
 registered.
        at org.jboss.mx.server.registry.BasicMBeanRegistry.add(BasicMBeanRegistry.java:756)
        at org.jboss.mx.server.registry.BasicMBeanRegistry.registerMBean(BasicMBeanRegistry.java:233)
        at sun.reflect.GeneratedMethodAccessor75.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:157)
        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
        at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:138)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:90)
        at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:140)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:90)
        at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
        at org.jboss.mx.server.MBeanServerImpl$3.run(MBeanServerImpl.java:1431)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.jboss.mx.server.MBeanServerImpl.registerMBean(MBeanServerImpl.java:1426)
        at org.jboss.mx.server.MBeanServerImpl.registerMBean(MBeanServerImpl.java:376)
        at org.jboss.deployers.structure.spi.helpers.AbstractDeploymentContext.registerMBeans(AbstractDeploymentContext.java:1030)
        at org.jboss.deployers.structure.spi.helpers.AbstractDeploymentContext.addComponent(AbstractDeploymentContext.java:722)
        at org.jboss.deployers.structure.spi.helpers.AbstractDeploymentUnit.addComponent(AbstractDeploymentUnit.java:251)
        at org.jboss.deployers.spi.deployer.helpers.ComponentAdapter.addComponent(ComponentAdapter.java:59)
        at org.jboss.deployers.spi.deployer.helpers.AbstractDeploymentVisitor.deploy(AbstractDeploymentVisitor.java:73)
        at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployerWithInput.deploy(AbstractRealDeployerWithInput.java:125)
        at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployerWithInput.internalDeploy(AbstractRealDeployerWithInput.java:102)
        at org.jboss.deployers.spi.deployer.helpers.AbstractComponentDeployer.internalDeploy(AbstractComponentDeployer.java:78)
        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: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:362)
        at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:255)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
        at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:280)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:135)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:65)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:142)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:166)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
        at java.lang.Thread.run(Thread.java:595)


I understand that Jboss is trying to register persistence-unit 'scan' more than once as persistence.xml occurs more than once. I did try putting persistence.xml in the META-INF of the ear file. However, that didn't work.  Your help would be greatly appreciated.

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