Java class loader, classloader! Recent production deployment encountered class cast exception, might be due to class loader again.
I will update once verified. Java class loader, got to crack it.
And found myself too focus, tuned to get tired, make me tired to think. Note this!
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Here is the exception encountered,which failed the deployment:
ClassCastException encountered during gcom v3 production release. 2012-06-09 05:08:20,659 INFO [main] spring.ServiceBean - Exposing service with name {http://www.bglobal.com/services/FASService}FASService 2012-06-09 05:08:20,669 INFO [main] ldap.LdapInstanceDescriptorPersistenceHelper - Services environment is OU=PROD 2012-06-09 05:08:20,672 WARN [main] ldap.LdapInstanceDescriptorPersistenceHelper - Could not configure the Realm javax.naming.NoInitialContextException: Cannot instantiate class: com.sun.jndi.dns.DnsContextFactory. Root exception is java.lang.ClassCastException: com.sun.jndi.dns.DnsContextFactory cannot be cast to javax.naming.spi.InitialContextFactory at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:659) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:250) at javax.naming.InitialContext.init(InitialContext.java:226) at javax.naming.InitialContext.<init>(InitialContext.java:202) at javax.naming.directory.InitialDirContext.<init>(InitialDirContext.java:87) at com.bglobal.reuse.serviceframework.directory.Realm.<init>(Realm.java:74) at com.bglobal.reuse.serviceframework.discovery.ldap.LdapInstanceDescriptorPersistenceHelper.<init>(LdapInstanceDescriptorPersistenceHelper.java:131) at com.bglobal.reuse.serviceframework.discovery.ldap.LdapInstanceDescriptorPersistenceHelper.<init>(LdapInstanceDescriptorPersistenceHelper.java:102) at com.bglobal.reuse.serviceframework.discovery.DefaultServiceLocator.<init>(DefaultServiceLocator.java:27) at com.bglobal.reuse.serviceframework.discovery.Registry.<init>(Registry.java:14) at com.bglobal.reuse.xfire.extensions.server.listeners.ServiceRegistrationEventListener.getRegistry(ServiceRegistrationEventListener.java:174) at com.bglobal.reuse.xfire.extensions.server.listeners.ServiceRegistrationEventListener.configureDiscovery(ServiceRegistrationEventListener.java:100) at com.bglobal.reuse.xfire.extensions.server.listeners.ServiceRegistrationEventListener.endpointRegistered(ServiceRegistrationEventListener.java:53) at org.codehaus.xfire.service.DefaultServiceRegistry.register(DefaultServiceRegistry.java:58) at org.codehaus.xfire.spring.ServiceBean.afterPropertiesSet(ServiceBean.java:226) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1477) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1417) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3910) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4393) 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.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.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$1.run(Main.java:556) at java.lang.Thread.run(Thread.java:619)
Reason for this:
Team member put some redundant library in the package, which cause diffferent class loader for duplicated class, ultimately caused this ClassCast Exception, which failed the deployment.
<dependency> <groupId>com.ibm.mq</groupId> <artifactId>jndi</artifactId> <version>${mq.version}</version> </dependency> <dependency> <groupId>com.ibm.mq</groupId> <artifactId>jta</artifactId> <version>${mq.version}</version> </dependency> <dependency> <groupId>com.ibm.mq</groupId> <artifactId>ldap</artifactId> <version>${mq.version}</version> </dependency> <dependency> <groupId>com.ibm.mq</groupId> <artifactId>postcard</artifactId> <version>${mq.version}</version> </dependency> <dependency> <groupId>com.ibm.mq</groupId> <artifactId>providerutil</artifactId> <version>${mq.version}</version> </dependency> <dependency> <groupId>com.ibm.mq</groupId> <artifactId>rmm</artifactId> <version>${mq.version}</version> </dependency>
The duplicate javax.naming.spi.InitialContextFactory is also in this library, which could caused different classloader for two same class.
<dependency> <groupId>com.ibm.mq</groupId> <artifactId>jndi</artifactId> <version>${mq.version}</version> </dependency>
Readings:
https://community.jboss.org/wiki/JBossClassLoaderIntroduction