0 Replies Latest reply on May 17, 2004 2:32 PM by rkadayam

    NPE on invoking an "advised" session bean

    rkadayam Newbie

      I have some utility beans that basically performs the following

      1. introspecting the session bean classes and generates the required XML for AOP pre-compilation.

      2. Ability to lookup a session bean and attach/detach interceptor bindings on it at run-time. ( I use a combination of AspectManager.addBinding() and removeBinding() calls)

      On running a test case that basically does (1) , deploys the AOPized EAR package and then does a little bit of attach and detaching (2) of interceptors to assert interception of session bean methods, I get the following NPE when invoking the session bean after attaching an interceptor to one of its methods. But this exception is not encountered on restarting the JBoss AS after deploying the AOPized EAR file. I'm using 3.2.3 and I added the DR4 version of jboss-aop.jar, javassist.jar to run.bat. I don't quite recall seeing this error in DR3.

      15:01:19,903 ERROR [LogInterceptor] RuntimeException:
      java.lang.NullPointerException
      at com.ascential.soa.service.test.testService.bean.TestServiceBean.ping(
      TestServiceBean.java)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
      java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
      sorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:324)
      at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(S
      tatelessSessionContainer.java:683)
      at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invo
      ke(CachedConnectionInterceptor.java:185)
      at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(Stat
      elessSessionInstanceInterceptor.java:72)
      at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInte
      rceptor.java:84)
      at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxIntercep
      torCMT.java:267)
      at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:1
      28)
      at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.
      java:118)
      at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
      at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFacto
      ryFinderInterceptor.java:122)
      at org.jboss.ejb.StatelessSessionContainer.internalInvoke(StatelessSessi
      onContainer.java:331)
      at org.jboss.ejb.Container.invoke(Container.java:700)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
      java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
      sorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:324)
      at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBea
      nDispatcher.java:284)
      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
      at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:
      367)
      at sun.reflect.GeneratedMethodAccessor46.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
      sorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:324)
      at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
      at sun.rmi.transport.Transport$1.run(Transport.java:148)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
      at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:4
      60)
      at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
      .java:701)
      at java.lang.Thread.run(Thread.java:534)