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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.web.WebContainer.loadJ2EEApplicationWebModules(WebContainer.java:1159)	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.admin.event.AdminEventMulticaster.multicastEvent(AdminEventMulticaster.java:182)	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.MBeanHelper.invokeOperationInBean(MBeanHelper.java:364)	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)