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java.lang.NullPointerException: 	at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate$SerializableLocalObjectDelegate.createObject(EJBLocalObjectInvocationHandlerDelegate.java:154)	at com.sun.ejb.containers.JavaEEObjectStreamHandlerForEJBs.resolveObject(JavaEEObjectStreamHandlerForEJBs.java:76)	at com.sun.enterprise.container.common.spi.util.JavaEEObjectInputStream.resolveObject(JavaEEObjectInputStream.java:72)	at java.io.ObjectInputStream.checkResolve(ObjectInputStream.java:1395)	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1988)	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1912)	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1795)	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1988)	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1912)	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1795)	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)	at org.apache.catalina.session.StandardSession.readRemainingObject(StandardSession.java:1818)	at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1750)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:616)	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:988)	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1890)	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1795)	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)	at org.apache.catalina.session.StandardSession.deserialize(StandardSession.java:1063)	at org.apache.catalina.session.StandardManager.readSessions(StandardManager.java:511)	at com.sun.enterprise.web.WebModule.loadSessions(WebModule.java:1557)	at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1949)	at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1619)	at com.sun.enterprise.web.WebApplication.start(WebApplication.java:90)	at org.glassfish.internal.data.EngineRef.start(EngineRef.java:126)	at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:241)	at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:236)	at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:339)	at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:183)	at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:272)	at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:305)	at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:320)	at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1176)	at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$900(CommandRunnerImpl.java:83)	at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)	at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1224)	at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:365)	at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:204)	at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:166)	at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:100)	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:245)	at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)	at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)	at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)	at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)	at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)	at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)	at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)	at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)	at com.sun.grizzly.ContextTask.run(ContextTask.java:69)	at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)	at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)	at java.lang.Thread.run(Thread.java:679)