title: Getting exception each time I try to deploy on Glassfish
body: <p>I get the following exception each time I try to deploy on Glassfish 3.1: </p>
  
  <pre><code>SEVERE: EJB5014: Exception resolving object
  java.lang.NullPointerException
      at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate$SerializableLocalObjectDelegate.createObject(EJBLocalObjectInvocationHandlerDelegate.java:158)
      at com.sun.ejb.base.io.EJBObjectInputStream.resolveObject(EJBObjectInputStream.java:105)
      at java.io.ObjectInputStream.checkResolve(ObjectInputStream.java:1376)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at no.breakpoint.sertifikatklb.application.org$jboss$weld$bean-SertifikatEJB_jar-SessionBean-QuestionBean_$$_WeldProxy.deserializeProxy(org$jboss$weld$bean-SertifikatEJB_jar-SessionBean-QuestionBean_$$_WeldProxy.java)
      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:597)
      at org.jboss.weld.bean.proxy.util.SerializableProxy.readObject(SerializableProxy.java:118)
      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:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at java.util.HashMap.readObject(HashMap.java:1030)
      at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1666)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1322)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at java.util.HashMap.readObject(HashMap.java:1030)
      at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1666)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1322)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at java.util.HashMap.readObject(HashMap.java:1030)
      at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at java.util.HashMap.readObject(HashMap.java:1030)
      at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at org.apache.catalina.session.StandardSession.readRemainingObject(StandardSession.java:1951)
      at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1859)
      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:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at org.apache.catalina.session.StandardSession.deserialize(StandardSession.java:1144)
      at org.apache.catalina.session.StandardManager.readSessions(StandardManager.java:492)
      at com.sun.enterprise.web.WebModule.loadSessions(WebModule.java:1573)
      at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2002)
      at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1651)
      at com.sun.enterprise.web.WebApplication.start(WebApplication.java:109)
      at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)
      at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)
      at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:294)
      at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:462)
      at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
      at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:382)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:355)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1064)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1244)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1232)
      at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:459)
      at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:209)
      at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:168)
      at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
      at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:238)
      at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
      at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)
      at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
      at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
      at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
      at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
      at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
      at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
      at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
      at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
      at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
      at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
      at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
      at java.lang.Thread.run(Thread.java:662)
  
  WARNING: WEB0517: Unable to restore sessions for web module [/sertifikat] from previous deployment
  org.jboss.weld.exceptions.WeldException: WELD-001500 Failed to deserialize proxy object
      at org.jboss.weld.bean.proxy.util.SerializableProxy.readObject(SerializableProxy.java:122)
      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:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at java.util.HashMap.readObject(HashMap.java:1030)
      at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1666)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1322)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at java.util.HashMap.readObject(HashMap.java:1030)
      at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1666)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1322)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at java.util.HashMap.readObject(HashMap.java:1030)
      at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at java.util.HashMap.readObject(HashMap.java:1030)
      at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at org.apache.catalina.session.StandardSession.readRemainingObject(StandardSession.java:1951)
      at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1859)
      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:597)
      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at org.apache.catalina.session.StandardSession.deserialize(StandardSession.java:1144)
      at org.apache.catalina.session.StandardManager.readSessions(StandardManager.java:492)
      at com.sun.enterprise.web.WebModule.loadSessions(WebModule.java:1573)
      at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2002)
      at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1651)
      at com.sun.enterprise.web.WebApplication.start(WebApplication.java:109)
      at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)
      at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)
      at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:294)
      at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:462)
      at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
      at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:382)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:355)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1064)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1244)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1232)
      at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:459)
      at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:209)
      at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:168)
      at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
      at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:238)
      at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
      at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)
      at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
      at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
      at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
      at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
      at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
      at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
      at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
      at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
      at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
      at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
      at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
      at java.lang.Thread.run(Thread.java:662) 
  
  Caused by: java.lang.reflect.InvocationTargetException
      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:597)
      at org.jboss.weld.bean.proxy.util.SerializableProxy.readObject(SerializableProxy.java:118)
      ... 105 more
  
  Caused by: java.io.IOException
      at com.sun.ejb.base.io.EJBObjectInputStream.resolveObject(EJBObjectInputStream.java:114)
      at java.io.ObjectInputStream.checkResolve(ObjectInputStream.java:1376)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
      at no.breakpoint.sertifikatklb.application.org$jboss$weld$bean-SertifikatEJB_jar-SessionBean-QuestionBean_$$_WeldProxy.deserializeProxy(org$jboss$weld$bean-SertifikatEJB_jar-SessionBean-QuestionBean_$$_WeldProxy.java)
      ... 110 more
  
  Caused by: java.lang.NullPointerException
      at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate$SerializableLocalObjectDelegate.createObject(EJBLocalObjectInvocationHandlerDelegate.java:158)
      at com.sun.ejb.base.io.EJBObjectInputStream.resolveObject(EJBObjectInputStream.java:105)
      ... 134 more
  </code></pre>
  
  <p>I will update with code if anyone could point me in the right direction because right now I do not know where to start. The application is deployed successfully, and it looks like queries against the database works when I am only retrieving data, but when I try to insert/edit it fails.</p>