[jboss-user] [EJB 3.0] - GetEJBObject NullPointerException
lydiachung
do-not-reply at jboss.com
Thu Jan 25 14:07:25 EST 2007
I have problem when I try to get the object back from EJB Handle.
I got the following exception:
13:42:40,959 ERROR [STDERR] java.lang.NullPointerException
| 13:42:40,959 ERROR [STDERR] at javax.naming.InitialContext.getURLScheme(Unknown Source)
| 13:42:40,959 ERROR [STDERR] at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
| 13:42:40,959 ERROR [STDERR] at javax.naming.InitialContext.lookup(Unknown Source)
| 13:42:40,959 ERROR [STDERR] at org.jboss.ejb3.stateful.StatefulHandleImpl.getEJBObject(StatefulHandleImpl.java:173)
| 13:42:40,959 ERROR [STDERR] at com.xxx.ejb3.ServiceLocator.getBean(ServiceLocator.java:45)
| 13:42:40,969 ERROR [STDERR] at com.xxx.ejb3.PresentationBean.process(PresentationBean.java:56)
| 13:42:40,969 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| 13:42:40,969 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
| 13:42:40,969 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
| 13:42:40,969 ERROR [STDERR] at java.lang.reflect.Method.invoke(Unknown Source)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:181)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:79)
| 13:42:40,969 ERROR [STDERR] at $Proxy229.process(Unknown Source)
| 13:42:40,969 ERROR [STDERR] at com.xxx.servlets.Gateway.doPost(Gateway.java:139)
| 13:42:40,969 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
| 13:42:40,969 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| 13:42:40,969 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| 13:42:40,969 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| 13:42:40,969 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| 13:42:40,969 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| 13:42:40,969 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
| 13:42:40,969 ERROR [STDERR] at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| 13:42:40,969 ERROR [STDERR] at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| 13:42:40,969 ERROR [STDERR] at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| 13:42:40,969 ERROR [STDERR] at java.lang.Thread.run(Unknown Source)
| 13:42:40,969 ERROR [STDERR] java.rmi.RemoteException: Error during getEJBObject; nested exception is:
| java.lang.NullPointerException
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.stateful.StatefulHandleImpl.getEJBObject(StatefulHandleImpl.java:180)
| 13:42:40,969 ERROR [STDERR] at com.xxx.ejb3.ServiceLocator.getBean(ServiceLocator.java:45)
| 13:42:40,969 ERROR [STDERR] at com.xxx.ejb3.PresentationBean.process(PresentationBean.java:56)
| 13:42:40,969 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| 13:42:40,969 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
| 13:42:40,969 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
| 13:42:40,969 ERROR [STDERR] at java.lang.reflect.Method.invoke(Unknown Source)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
| 13:42:40,969 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,969 ERROR [STDERR] at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,989 ERROR [STDERR] at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,989 ERROR [STDERR] at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,989 ERROR [STDERR] at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
| 13:42:40,989 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 13:42:40,989 ERROR [STDERR] at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:181)
| 13:42:40,989 ERROR [STDERR] at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:79)
| 13:42:40,989 ERROR [STDERR] at $Proxy229.process(Unknown Source)
| 13:42:40,989 ERROR [STDERR] at com.xxx.servlets.Gateway.doPost(Gateway.java:139)
| 13:42:40,989 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
| 13:42:40,989 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| 13:42:40,989 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| 13:42:40,989 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| 13:42:40,989 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| 13:42:40,989 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| 13:42:40,989 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
| 13:42:40,989 ERROR [STDERR] at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| 13:42:40,989 ERROR [STDERR] at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| 13:42:40,989 ERROR [STDERR] at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| 13:42:40,989 ERROR [STDERR] at java.lang.Thread.run(Unknown Source)
| 13:42:40,989 ERROR [STDERR] Caused by: java.lang.NullPointerException
| 13:42:40,989 ERROR [STDERR] at javax.naming.InitialContext.getURLScheme(Unknown Source)
| 13:42:40,989 ERROR [STDERR] at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
| 13:42:40,989 ERROR [STDERR] at javax.naming.InitialContext.lookup(Unknown Source)
| 13:42:40,989 ERROR [STDERR] at org.jboss.ejb3.stateful.StatefulHandleImpl.getEJBObject(StatefulHandleImpl.java:173)
| 13:42:40,989 ERROR [STDERR] ... 51 more
|
I have a ServiceLocator which get the Handle of NamePoolBean (stateful bean) and try to restore the NamePoolBean from the Handle.
My programs are:
| @Stateful
| @Remote(NamePool.class)
| @RemoteHome(NamePoolHome.class)
| public class NamePoolBean{
| }
|
| public interface NamePool extends EJBObject{
| public Handle getHandle();
| }
|
| public interface NamePoolHome extends EJBHome{
| public NamePool create() throws CreateException, RemoteException;
| }
|
| public class ServiceLocator {
| public void getBean(){
| context = new InitialContext();
| namePoolHome = (NamePoolHome) context.lookup("PROJ/NamePoolBean/remoteHome");
| namePool = namePoolHome.create();
| handle = namePool.getHandle();
| EJBObject ejbObject = handle.getEJBObject();
| }
|
Can anybody help?
Thanks,
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