Spring Webapp in Weblogic publish error

Question

I am getting the below exception, when I try to publish my Spring MVC Webapp:

Context initialization failed || java.lang.LinkageError: loader constraint violation: loader (instance of org/springframework/context/support/ContextTypeMatchClassLoader$ContextOverridingClassLoader) previously initiated loading for a different type with name "org/apache/http/params/HttpParams" at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(Unknown Source) at java.lang.ClassLoader.defineClass(Unknown Source) at java.lang.ClassLoader.defineClass(Unknown Source) at org.springframework.context.support.ContextTypeMatchClassLoader$ContextOverridingClassLoader.loadClassForOverriding(ContextTypeMatchClassLoader.java:109) at org.springframework.core.OverridingClassLoader.loadClass(OverridingClassLoader.java:61) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Unknown Source) at java.lang.Class.getDeclaredMethods(Unknown Source) at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:467) at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:481) at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:451) at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:511) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:634) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:573) at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:510) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:339) at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:308) at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:638) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:454) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111) at weblogic.servlet.internal.EventsManager$FireContextListenerAction.run(EventsManager.java:481) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120) at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:181) at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1873) at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:3161) at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1511) at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:483) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119) at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200) at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:247) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119) at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:27) at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:636) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52) at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:205) at weblogic.application.internal.EarDeployment.activate(EarDeployment.java:58) at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:161) at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:79) at weblogic.deploy.internal.targetserver.BasicDeployment.activate(BasicDeployment.java:184) at weblogic.deploy.internal.targetserver.BasicDeployment.activateFromServerLifecycle(BasicDeployment.java:361) at weblogic.management.deploy.internal.DeploymentAdapter$1.doActivate(DeploymentAdapter.java:51) at weblogic.management.deploy.internal.DeploymentAdapter.activate(DeploymentAdapter.java:200) at weblogic.management.deploy.internal.AppTransition$2.transitionApp(AppTransition.java:30) at weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:240) at weblogic.management.deploy.internal.ConfiguredDeployments.activate(ConfiguredDeployments.java:169) at weblogic.management.deploy.internal.ConfiguredDeployments.deploy(ConfiguredDeployments.java:123) at weblogic.management.deploy.internal.DeploymentServerService.resume(DeploymentServerService.java:180) at weblogic.management.deploy.internal.DeploymentServerService.start(DeploymentServerService.java:96) at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64) at weblogic.work.ExecuteRequestAdapter.execute(ExecuteRequestAdapter.java:21) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:145) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:117)^^

Answer 1

You're VERY likely loading the same class twice and with two different versions. Specifically you might have two versions of:

org/apache/http/params/HttpParams

Check the application you are loading and what weblogic already supplies. You can either remove the duplicate class/jar like:

java.lang.LinkageError Error in Class Loading

java.lang.LinkageError: loader constraint violation previously initiated loading for a different type with name "javax/xml/soap/SOAPMessage"

Or you can use preferred classes in weblogic to explicitly state which version of the class to use (likely the one packaged in your application). See:

NetBeans taking JSF Server library instead of registered libraries