Last month, i began to develope JEE application using Struts2 framework, Spring plugins, Hibernate , oracle and Websphere Application sever v.7. Actually, it is not new development, just migration from DB2 and Apache tomcat environment to Oracle and WAS environment.
This application, let’s called X application, is initially developed under Windows Server , JEE 5, Apache tomcat and IBM DB2 database System. It has been running at a government company as known as BUMN for a year and run smoothly.
When the migration is began, i switch the DB2 system to oracle and the Application server to WAS, without major changes on sources of application, but Connection configuration only. Then, i build and deploy it to development server (IBM P Series and AIX 6 environment).
First error i found is this :
at java.lang.Class.getDeclaredFieldsImpl(Native Method) at java.lang.Class.getDeclaredFields(Class.java:543) at com.opensymphony.xwork2.inject.ContainerImpl.addInjectors(ContainerImpl.java:89) at com.opensymphony.xwork2.inject.ContainerImpl$1.create(ContainerImpl.java:71) at com.opensymphony.xwork2.inject.ContainerImpl$1.create(ContainerImpl.java:67) at com.opensymphony.xwork2.inject.util.ReferenceCache$CallableCreate.call(ReferenceCache.java:150) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:314) at java.util.concurrent.FutureTask.run(FutureTask.java:149) at com.opensymphony.xwork2.inject.util.ReferenceCache.internalCreate(ReferenceCache.java:76) at com.opensymphony.xwork2.inject.util.ReferenceCache.get(ReferenceCache.java:116) at com.opensymphony.xwork2.inject.ContainerImpl$ConstructorInjector.<init>(ContainerImpl.java:348) at com.opensymphony.xwork2.inject.ContainerImpl$5.create(ContainerImpl.java:305) at com.opensymphony.xwork2.inject.ContainerImpl$5.create(ContainerImpl.java:301) at com.opensymphony.xwork2.inject.util.ReferenceCache$CallableCreate.call(ReferenceCache.java:150) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:314) at java.util.concurrent.FutureTask.run(FutureTask.java:149) at com.opensymphony.xwork2.inject.util.ReferenceCache.internalCreate(ReferenceCache.java:76) at com.opensymphony.xwork2.inject.util.ReferenceCache.get(ReferenceCache.java:116) at com.opensymphony.xwork2.inject.ContainerImpl.getConstructor(ContainerImpl.java:594) at com.opensymphony.xwork2.inject.ContainerImpl.inject(ContainerImpl.java:491) at com.opensymphony.xwork2.inject.ContainerImpl$7.call(ContainerImpl.java:532) at com.opensymphony.xwork2.inject.ContainerImpl.callInContext(ContainerImpl.java:581) at com.opensymphony.xwork2.inject.ContainerImpl.inject(ContainerImpl.java:530) at com.opensymphony.xwork2.config.impl.LocatableFactory.create(LocatableFactory.java:32) at com.opensymphony.xwork2.inject.ContainerBuilder$4.create(ContainerBuilder.java:130) at com.opensymphony.xwork2.inject.Scope$2$1.create(Scope.java:51) at com.opensymphony.xwork2.inject.ContainerImpl$ParameterInjector.inject(ContainerImpl.java:462) at com.opensymphony.xwork2.inject.ContainerImpl.getParameters(ContainerImpl.java:477) at com.opensymphony.xwork2.inject.ContainerImpl.access$000(ContainerImpl.java:34) at com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector.inject(ContainerImpl.java:293) at com.opensymphony.xwork2.inject.ContainerImpl$2.call(ContainerImpl.java:104) at com.opensymphony.xwork2.inject.ContainerImpl$2.call(ContainerImpl.java:101) at com.opensymphony.xwork2.inject.ContainerImpl.callInContext(ContainerImpl.java:574) at com.opensymphony.xwork2.inject.ContainerImpl.injectStatics(ContainerImpl.java:101) at com.opensymphony.xwork2.inject.ContainerBuilder.create(ContainerBuilder.java:493) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:184) at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374) at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418) at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.init(FilterInstanceWrapper.java:140) at com.ibm.ws.webcontainer.filter.WebAppFilterManager._loadFilter(WebAppFilterManager.java:509) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.loadFilter(WebAppFilterManager.java:423) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.getFilterInstanceWrapper(WebAppFilterManager.java:282) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.getFilterChain(WebAppFilterManager.java:340) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:812) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:917) at com.ibm.ws.webcontainer.extension.DefaultExtensionProcessor.invokeFilters(DefaultExtensionProcessor.java:924) at com.ibm.ws.webcontainer.extension.DefaultExtensionProcessor.handleRequest(DefaultExtensionProcessor.java:651) at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3610) at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:274) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:926) at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1557) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:173) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384) at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83) at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165) at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217) at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161) at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138) at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:202) at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:766) at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:896) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527) Caused by: java.lang.ClassNotFoundException: org.apache.velocity.app.VelocityEngine at java.net.URLClassLoader.findClass(URLClassLoader.java:419) at com.ibm.ws.bootstrap.ExtClassLoader.findClass(ExtClassLoader.java:150) at java.lang.ClassLoader.loadClass(ClassLoader.java:643) at com.ibm.ws.bootstrap.ExtClassLoader.loadClass(ExtClassLoader.java:90) at java.lang.ClassLoader.loadClass(ClassLoader.java:609) at com.ibm.ws.classloader.ProtectionClassLoader.loadClass(ProtectionClassLoader.java:62) at com.ibm.ws.classloader.ProtectionClassLoader.loadClass(ProtectionClassLoader.java:58) at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:466) at java.lang.ClassLoader.loadClass(ClassLoader.java:609) at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:466) at java.lang.ClassLoader.loadClass(ClassLoader.java:609) ... 66 more
the stack trace indicate there is missing class related to velocity engine. I don’t know why this happened, because currently on the application i don’t use velocity implementation at all.
to resolve this error, i add velocity and velocity tools library to build path and rebuild the application, but it doesn’t work, the server still throw the same error. I explore the installation folder of WAS and found library folder contains ext folder inside, i assume this folder is for external library needed by the server to run the installed application. I copy the library to this folder, and restart the server, and finally the application is up and running.
the library i added to the WAS is attached below :