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

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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 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 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 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 org.glassfish.internal.data.EngineRef.start(EngineRef.java:126)
at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:241)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:339)
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$ExecutionContext.execute(CommandRunnerImpl.java:1224)
at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:365)
at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:100)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at java.lang.Thread.run(Thread.java:679)

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