7 Replies Latest reply on Mar 30, 2010 11:04 AM by Paul Ferraro

    Exception handling during context startup

    Adam Karl Novice

      I have a setup with 2 mod_cluster 1.0.0.GA load balancers and 2 JBoss 5.1 app servers.  The app servers know about the load balancers via configuration and advertisement/discovery is turned off.  My application is an EAR with 3 WARs and a JAR data-source inside it (pretty standard web services).  I deploy the application using the farm deployer.  All of this so far works fine.  I start the app servers up, they find each other (JGroups), they find the load balancers.  I deploy the app and all is fine.  Both app servers get the deployment and tell the load balancers about it.  Now at some point I need to restart one of the app servers.  It happens to be the non-master node in the cluster.  When I do this the app server starts up, deploys 2 out of the 3 WARs and then throws mod cluster errors at me which then fails the deployment of the entire EAR.  The EAR never tries to restart itself which is the expected JBoss behavior for failed deployments.  If I push a new EAR to either node after startup the app starts up correctly on both nodes.  If I shut down one of the load balancers no failures occur during app server restart and/or redeployment.

       

      The exception below is troubling but I'm actually more worried that this mod_cluster communications error is causing my application deployment to fail when mod_cluster could handle the exception and try connecting to the load balancers at a later time.

       

      {code}
      java.lang.IllegalStateException: No valid response to RPC [sendRequest]

       

      at org.jboss.modcluster.ha.ClusteredMCMPHandlerImpl$RpcStub.invokeRpc(ClusteredMCMPHandlerImpl.java:527)

      at org.jboss.modcluster.ha.ClusteredMCMPHandlerImpl$RpcStub.invokeRpc(ClusteredMCMPHandlerImpl.java:483)

      at org.jboss.modcluster.ha.ClusteredMCMPHandlerImpl$RpcStub.sendRequest(ClusteredMCMPHandlerImpl.java:463)

      at org.jboss.modcluster.ha.ClusteredMCMPHandlerImpl.sendRequest(ClusteredMCMPHandlerImpl.java:331)

      at org.jboss.modcluster.CatalinaEventHandler.startContext(CatalinaEventHandler.java:268)

      at org.jboss.modcluster.CatalinaEventHandler.startContext(CatalinaEventHandler.java:55)

      at org.jboss.modcluster.CatalinaEventHandlerAdapter.lifecycleEvent(CatalinaEventHandlerAdapter.java:121)

      at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)

      at org.apache.catalina.core.StandardContext.start(StandardContext.java:4312)

      at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeployInternal(TomcatDeployment.java:310)

      at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeploy(TomcatDeployment.java:142)

      at org.jboss.web.deployers.AbstractWarDeployment.start(AbstractWarDeployment.java:461)

      at org.jboss.web.deployers.WebModule.startModule(WebModule.java:118)

      at org.jboss.web.deployers.WebModule.start(WebModule.java:97)

      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

      at java.lang.reflect.Method.invoke(Method.java:597)

      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157)

      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)

      at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)

      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)

      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)

      at org.jboss.system.microcontainer.ServiceProxy.invoke(ServiceProxy.java:206)

      at $Proxy38.start(Unknown Source)

      at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:42)

      at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:37)

      at org.jboss.dependency.plugins.action.SimpleControllerContextAction.secureInstallAction(SimpleControllerContextAction.java:67)

      at org.jboss.dependency.plugins.action.AccessControllerContextAction$1.run(AccessControllerContextAction.java:80)

      at java.security.AccessController.doPrivileged(Native Method)

      at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:103)

      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.start(ServiceController.java:460)

      at org.jboss.system.deployers.ServiceDeployer.start(ServiceDeployer.java:163)

      at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:99)

      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.repository.ProfileDeployAction.install(ProfileDeployAction.java:70)

      at org.jboss.system.server.profileservice.repository.AbstractProfileAction.install(AbstractProfileAction.java:53)

      at org.jboss.system.server.profileservice.repository.AbstractProfileService.install(AbstractProfileService.java:361)

      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.system.server.profileservice.repository.AbstractProfileService.activateProfile(AbstractProfileService.java:306)

      at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start(ProfileServiceBootstrap.java:271)

      at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java:461)

      at org.jboss.Main.boot(Main.java:221)

      at org.jboss.Main$1.run(Main.java:556)

      at java.lang.Thread.run(Thread.java:619)

      2010-02-18 07:13:12,486 ERROR [org.apache.catalina.core.StandardContext] Context [/edge-test/version/20659] startup failed due to previous errors

      {code}

       

      The following errors are seen in the httpd error_log at the time when the exception above is thrown by the app server.

       

      {code}

      [error] ajp_cping_cpong: apr_socket_recv failed

      {code}

       

      I have also tried updating mod_cluster to 1.0.3.GA on one of the load balancers.  This had no effect on the results.