[jboss-user] [JBoss Seam] - Weird classloading problem
adamw
do-not-reply at jboss.com
Wed Jan 9 14:09:22 EST 2008
Hello,
I have a really weird problem which happens only sometimes (that's the worst kind of problems) and in different ways. The only thing the symptoms have in common is ClassDefNotFoundException.
So, I have a standard seam app, generated with seam-gen, with only one exception: I have a separate .jar with interfaces and model classes which is deployed parallerly to the .ear (I separated the interfaces and model classes so I can access the ejb services from other apps).
It work fine until recently, however I have no idea when exactly the problem started to appear (as it appears sometimes, it's hard to find the cause ...).
I noticed that the errors appear more often if a method is called on regular intervals of time, beginning with the "org.jboss.seam.postInitialization" event (I use the quartz scheduler).
So the error is one of the following:
- java.lang.NoClassDefFoundError: org/jboss/seam/Instance
- java.lang.NoClassDefFoundError: org/jboss/seam/interceptor/Proxy
- java.lang.NoClassDefFoundError: <my model class>
- java.lang.NoClassDefFoundError: <my helper model class>; this exception is thrown during deserialization of that class; instances of it are held serialized in the DB.
Here is the stack trace for the first example:
| 19:55:49,230 INFO [Initialization] done initializing Seam
| 19:55:49,264 ERROR [JobRunShell] Job DEFAULT.-4531f942:1175fe7c870:-7ffd threw an unhandled Exception:
| javax.ejb.EJBException: org.jboss.seam.InstantiationException: Could not instantiate Seam component: feedsService
| at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:63)
| at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
| at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
| at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:214)
| at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:184)
| at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:81)
| at $Proxy170.update(Unknown Source)
| 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:585)
| at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
| at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
| at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:76)
| at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
| at org.jboss.seam.async.AsynchronousInterceptor.aroundInvoke(AsynchronousInterceptor.java:50)
| at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
| at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
| at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:54)
| at org.javassist.tmp.java.lang.Object_$$_javassist_3.update(Object_$$_javassist_3.java)
| 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:585)
| at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
| at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:125)
| at org.jboss.seam.async.AsynchronousInvocation.call(AsynchronousInvocation.java:52)
| at org.jboss.seam.async.Asynchronous.executeInContexts(Asynchronous.java:76)
| at org.jboss.seam.async.Asynchronous.execute(Asynchronous.java:45)
| at org.jboss.seam.async.QuartzDispatcher$QuartzJob.execute(QuartzDispatcher.java:304)
| at org.quartz.core.JobRunShell.run(JobRunShell.java:203)
| at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
| Caused by: org.jboss.seam.InstantiationException: Could not instantiate Seam component: feedsService
| at org.jboss.seam.Component.newInstance(Component.java:1962)
| at org.jboss.seam.Component.getInstance(Component.java:1865)
| at org.jboss.seam.Component.getInstance(Component.java:1832)
| at org.jboss.seam.Component.getInstanceInAllNamespaces(Component.java:2174)
| at org.jboss.seam.Component.getValueToInject(Component.java:2126)
| at org.jboss.seam.Component.injectAttributes(Component.java:1590)
| at org.jboss.seam.Component.inject(Component.java:1408)
| at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:45)
| at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
| at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
| at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
| at org.jboss.seam.persistence.EntityManagerProxyInterceptor.aroundInvoke(EntityManagerProxyInterceptor.java:26)
| at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
| at org.jboss.seam.persistence.HibernateSessionProxyInterceptor.aroundInvoke(HibernateSessionProxyInterceptor.java:27)
| at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
| at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
| at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:50)
| 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:585)
| at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
| at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
| ... 42 more
| Caused by: java.lang.RuntimeException: by java.lang.NoClassDefFoundError: org/jboss/seam/Instance
| at org.jboss.seam.util.ProxyFactory.createClass(ProxyFactory.java:190)
| at org.jboss.seam.Component.createProxyFactory(Component.java:2252)
| at org.jboss.seam.Component.getProxyFactory(Component.java:1367)
| at org.jboss.seam.Component.wrap(Component.java:1358)
| at org.jboss.seam.Component.instantiateSessionBean(Component.java:1280)
| at org.jboss.seam.Component.instantiate(Component.java:1265)
| at org.jboss.seam.Component.newInstance(Component.java:1958)
| ... 70 more
| Caused by: javassist.CannotCompileException: by java.lang.NoClassDefFoundError: org/jboss/seam/Instance
| at javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:165)
| at org.jboss.seam.util.ProxyFactory.createClass(ProxyFactory.java:186)
| ... 76 more
| Caused by: java.lang.NoClassDefFoundError: org/jboss/seam/Instance
| at java.lang.ClassLoader.defineClass1(Native Method)
| at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
| at sun.reflect.GeneratedMethodAccessor106.invoke(Unknown Source)
| at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| at java.lang.reflect.Method.invoke(Method.java:585)
| at javassist.util.proxy.FactoryHelper.toClass2(FactoryHelper.java:177)
| at javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:159)
| ... 77 more
|
(here you can see the quartz schduler at work, but it also happens when this is turned off, and looks very similar).
Anybody has any ideas, where at least I can start looking?
--
Adam
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