java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.sun.enterprise.ee.web.sessmgmt.JxtaReplicationSender.putPipeWrapper(JxtaReplicationSender.java:885)
at com.sun.enterprise.ee.web.sessmgmt.JxtaReplicationSender.sendReplicationStateHC(JxtaReplicationSender.java:483)
at com.sun.enterprise.ee.web.sessmgmt.ReplicationHealthChecker.doTransmit(ReplicationHealthChecker.java:454)
at com.sun.enterprise.ee.web.sessmgmt.ReplicationHealthChecker.doPipeTest(ReplicationHealthChecker.java:432)
at com.sun.enterprise.ee.web.sessmgmt.JxtaBiDiPipeWrapper.areCurrentPipesOk(JxtaBiDiPipeWrapper.java:1512)
at com.sun.enterprise.ee.web.sessmgmt.JxtaBiDiPipeWrapper.testStartupAndReshapeIfNecessary(JxtaBiDiPipeWrapper.java:256)
at com.sun.enterprise.ee.web.sessmgmt.JxtaBiDiPipeWrapper.start(JxtaBiDiPipeWrapper.java:223)
at com.sun.enterprise.ee.web.sessmgmt.JxtaReplicationReceiver.doPipeInitialization(JxtaReplicationReceiver.java:338)
at com.sun.enterprise.ee.web.initialization.ReplicatedWebmethodSessionStrategyBuilder.initializePersistenceStrategy(ReplicatedWebmethodSessionStrategyBuilder.java:169)
at com.sun.enterprise.web.WebModule.configureSessionManager(WebModule.java:1087)
at com.sun.enterprise.web.WebModule.configureSessionSettings(WebModule.java:1041)
at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1562)
at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1232)
at com.sun.enterprise.server.TomcatApplicationLoader.doLoad(TomcatApplicationLoader.java:141)
at com.sun.enterprise.server.ExtendedApplicationLoader.doLoad(ExtendedApplicationLoader.java:134)
at com.sun.enterprise.server.AbstractLoader.load(AbstractLoader.java:238)
at com.sun.enterprise.server.ApplicationManager.applicationDeployed(ApplicationManager.java:336)
at com.sun.enterprise.server.ApplicationManager.applicationDeployed(ApplicationManager.java:210)
at com.sun.enterprise.server.ApplicationManager.applicationDeployed(ApplicationManager.java:645)
at com.sun.enterprise.admin.event.AdminEventMulticaster.invokeApplicationDeployEventListener(AdminEventMulticaster.java:959)
at com.sun.enterprise.admin.event.AdminEventMulticaster.handleApplicationDeployEvent(AdminEventMulticaster.java:943)
at com.sun.enterprise.admin.event.AdminEventMulticaster.processEvent(AdminEventMulticaster.java:467)
at com.sun.enterprise.ee.admin.mbeans.ServerRuntimeMBean.forwardEvent(ServerRuntimeMBean.java:95)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.sun.enterprise.admin.MBeanHelper.invokeOperationInBean(MBeanHelper.java:381)
at com.sun.enterprise.admin.runtime.BaseRuntimeMBean.invoke(BaseRuntimeMBean.java:468)
at com.sun.jmx.mbeanserver.DynamicMetaDataImpl.invoke(DynamicMetaDataImpl.java:213)
at com.sun.jmx.mbeanserver.MetaDataImpl.invoke(MetaDataImpl.java:220)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:815)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:784)
at sun.reflect.GeneratedMethodAccessor53.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at undefined.$Proxy1.invoke(Unknown Source)
at com.sun.enterprise.admin.server.core.jmx.SunoneInterceptor.invoke(SunoneInterceptor.java:304)
at com.sun.enterprise.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:174)
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1410)
at javax.management.remote.rmi.RMIConnectionImpl.access$100(RMIConnectionImpl.java:81)
at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1247)
at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1343)
at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:784)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707)
at java.lang.Thread.run(Thread.java:595)

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