[jboss-user] [JBoss Seam] - NPE in RepositoryClassLoader

[ollix]

I get an exception, that I cannot relate to where it is thrown. 
It happens, when I try to read a property of a stateful session bean inside a JSP using the EL. This property is a simple getter inside the component.
The component has an "@In" refrence to the seam identity component, but it is not used inside the getter.
The exception shows up spontaniously - the behaviour is NOT consistent and cannot reliably reproduced.
The same exception happens for the 
'#{org.jboss.seam.core.localeSelector}' component.

My first guess is, that the components are not yet instantiated, when the getter is read. But since that happens automagically, I have no idea, what could cause this behaviour.

I hope somebody can give me a hint on where to look for the cause of the exception
Thanks 

this is the last part of the stack trace.

  | ....
  | Caused by: javax.faces.el.EvaluationException: Cannot get value for expression '#{org.jboss.seam.security.identity}'
  | 	at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:402)
  | 	at org.jboss.seam.core.Expressions$1.getValue(Expressions.java:69)
  | 	at org.jboss.seam.Component.getInstanceFromFactory(Component.java:1684)
  | 	at org.jboss.seam.Component.getInstance(Component.java:1633)
  | 	at org.jboss.seam.Component.getInstance(Component.java:1610)
  | 	at org.jboss.seam.Component.getValueToInject(Component.java:1885)
  | 	at org.jboss.seam.Component.injectAttributes(Component.java:1368)
  | 	at org.jboss.seam.Component.inject(Component.java:1195)
  | 	at org.jboss.seam.interceptors.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
  | 	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
  | 	at org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27)
  | 	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
  | 	at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
  | 	at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:53)
  | 	at sun.reflect.GeneratedMethodAccessor8647.invoke(Unknown Source)
  | 	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.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:57)
  | 	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:46)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 	at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
  | 	... 93 more
  | Caused by: java.lang.NullPointerException
  | 	at org.jboss.mx.loading.RepositoryClassLoader.findClass(RepositoryClassLoader.java:620)
  | 	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  | 	at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:464)
  | 	at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:405)
  | 	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
  | 	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
  | 	at org.jboss.seam.jsf.SeamApplication11.getPropertyResolver(SeamApplication11.java:197)
  | 	at org.apache.myfaces.el.ELParserHelper$MyPropertySuffix.evaluate(ELParserHelper.java:532)
  | 	at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
  | 	at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:383)
  | 	... 119 more
  | 

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