java.lang.NullPointerException

Oracle Community | 843830 | 1 decade ago
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Root Cause Analysis

  1. java.lang.NullPointerException

    No message provided

    at mytesting.calculator.CalculatorBean.conn()
  2. mytesting.calculator
    CalculatorBean.conn
    1. mytesting.calculator.CalculatorBean.conn(CalculatorBean.java:76)
    1 frame
  3. Java RT
    Method.invoke
    1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    4. java.lang.reflect.Method.invoke(Method.java:324)
    4 frames
  4. JBoss Application Server Server
    StatelessSessionContainer$ContainerInterceptor.invoke
    1. org.jboss.invocation.Invocation.performCall(Invocation.java:345)
    2. org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:214)
    2 frames
  5. JBoss Application Server Connector
    CachedConnectionInterceptor.invoke
    1. org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:185)
    1 frame
  6. JBoss Application Server Server
    StatelessSessionInstanceInterceptor.invoke
    1. org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:130)
    1 frame
  7. org.jboss.webservice
    ServiceEndpointInterceptor.invoke
    1. org.jboss.webservice.server.ServiceEndpointInterceptor.invoke(ServiceEndpointInterceptor.java:51)
    1 frame
  8. JBoss Application Server Server
    Container.invoke
    1. org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:48)
    2. org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:105)
    3. org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:335)
    4. org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:166)
    5. org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:139)
    6. org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:192)
    7. org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122)
    8. org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:624)
    9. org.jboss.ejb.Container.invoke(Container.java:873)
    9 frames
  9. Java RT
    Method.invoke
    1. sun.reflect.GeneratedMethodAccessor68.invoke(Unknown Source)
    2. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    3. java.lang.reflect.Method.invoke(Method.java:324)
    3 frames
  10. org.jboss.mx
    ReflectedDispatcher.invoke
    1. org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
    1 frame
  11. JBoss Application Server J2SE
    MBeanServerImpl.invoke
    1. org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    2. org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
    3. org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
    4. org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    4 frames
  12. JBoss Application Server Server
    JRMPInvoker.invoke
    1. org.jboss.invocation.jrmp.server.JRMPInvoker$MBeanServerAction.invoke(JRMPInvoker.java:805)
    2. org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:406)
    2 frames
  13. Java RT
    Thread.run
    1. sun.reflect.GeneratedMethodAccessor67.invoke(Unknown Source)
    2. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    3. java.lang.reflect.Method.invoke(Method.java:324)
    4. sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
    5. sun.rmi.transport.Transport$1.run(Transport.java:148)
    6. java.security.AccessController.doPrivileged(Native Method)
    7. sun.rmi.transport.Transport.serviceCall(Transport.java:144)
    8. sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
    9. sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
    10. java.lang.Thread.run(Thread.java:534)
    10 frames