1 Reply Latest reply on Jun 8, 2007 7:11 PM by koen handekyn

    NPE in RepositoryClassLoader

    Oliver Charlet Newbie

      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