Sebastien Pennec [http://community.jboss.org/people/spennec] created the discussion "NullPointerException in MethodJoinPointGenerator" To view the discussion, visit: http://community.jboss.org/message/606236#606236 -------------------------------------------------------------- Hi! I'm experiencing a strange problem with JBoss AOP, with JBoss 5.1.0 EAP. Here is a part of my aop.xml file, in the bootstrap directory:    <bean name="AspectManager" class="org.jboss.aop.deployers.AspectManagerJDK5">           .....       <property name="enableLoadtimeWeaving">true</property>       <property name="include">org.jacorb.poa,com.myCompany.util.bus.mdb.</property>           .....           </bean> In a jar that is in the deploy directory, I have a jboss-aop.xml file that contains: <aop>   ...           <interceptor name="jmsOnMessageInterceptor" class="com.myCompany.util.jms.OnMessageInterceptor" />           <bind pointcut="execution(public void $instanceof{javax.jms.MessageListener}->onMessage(javax.jms.Message))">     <interceptor-ref name="jmsOnMessageInterceptor" />           </bind> </aop> In the same jar, I have a class that implements the org.jboss.aop.advice.Interceptor interface and simply logs something (for the moment). In the server logs, I can see the following lines: 12:28:37,817 DEBUG [Instrumentor] trying to transform com.myCompany.util.bus.mdb.BusMDBBean ... 12:28:37,958 DEBUG [JoinpointSimpleClassifier] javassist.CtMethod@3a509631[public onMessage (Ljavax/jms/Message;)V] method execution joinpoint matches pointcut: execution(public void $instanceof{javax.jms.MessageListener}->onMessage(javax.jms.Message)) 12:28:38,942 DEBUG [Instrumentor] was com.myCompany.util.bus.mdb.BusMDBBean converted: true 12:28:39,192 ERROR [SuperClassesFirstWeavingStrategy] java.lang.RuntimeException: Error converting class ... And when the onMessage method is called, I see the following exception: Caused by: java.lang.NullPointerException           at org.jboss.aop.instrument.MethodJoinPointGenerator.<init>(MethodJoinPointGenerator.java:78)           at org.jboss.aop.GeneratedClassAdvisor$ClassAdvisorStrategy.getJoinPointGenerator(GeneratedClassAdvisor.java:1314)           at org.jboss.aop.GeneratedClassAdvisor.getJoinPointGenerator(GeneratedClassAdvisor.java:781)           at org.jboss.aop.GeneratedClassAdvisor.fullWorkFinalizeMethodChain(GeneratedClassAdvisor.java:635)           at org.jboss.aop.GeneratedClassAdvisor.finalizeMethodChain(GeneratedClassAdvisor.java:599)           at org.jboss.aop.GeneratedClassAdvisor.finalizeChains(GeneratedClassAdvisor.java:580)           at org.jboss.aop.ClassAdvisor.createInterceptorChains(ClassAdvisor.java:609)           at org.jboss.aop.GeneratedClassAdvisor.access$201(GeneratedClassAdvisor.java:65)           at org.jboss.aop.GeneratedClassAdvisor$ClassAdvisorStrategy.createInterceptorChains(GeneratedClassAdvisor.java:1306)           at org.jboss.aop.GeneratedClassAdvisor.createInterceptorChains(GeneratedClassAdvisor.java:410)           at org.jboss.aop.ClassAdvisor$1.run(ClassAdvisor.java:306)           at java.security.AccessController.doPrivileged(Native Method)           at org.jboss.aop.ClassAdvisor.attachClass(ClassAdvisor.java:276)           at org.jboss.aop.AspectManager.initialiseClassAdvisor(AspectManager.java:754)           at org.jboss.aop.GeneratedClassAdvisor$ClassAdvisorStrategy.initialise(GeneratedClassAdvisor.java:1294)           at org.jboss.aop.GeneratedClassAdvisor.initialise(GeneratedClassAdvisor.java:146)           at com.myCompany.util.bus.mdb.BusMDBBean$BusMDBBeanAdvisor.initialise(BusMDBBean$BusMDBBeanAdvisor.java)           at com.myCompany.util.bus.mdb.BusMDBBean$BusMDBBeanAdvisor.<init>(BusMDBBean$BusMDBBeanAdvisor.java)           at com.myCompany.util.bus.mdb.BusMDBBean.<clinit>(BusMDBBean.java) Can anybody help me out? Is there a point that I have missed? Thanks! -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/606236#606236] Start a new discussion in JBoss AOP at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]