title: Error While starting/stopping the application-Apache tomcat server
body: <p>I'm getting this exception, while starting my web application, that is running in the apache tomcat 6.0.29 
  Can any one help why am i getting error like this: How to resolve this. Please help me with the reason of getting this error</p>
  
  <pre><code>SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.oe.ws.beans.CardBean
  java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.oe.ws.beans.CardBean
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
      at java.util.ArrayList.readObject(ArrayList.java:696)
      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:1865)
      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
      at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1475)
      at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:977)
      at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:394)
      at org.apache.catalina.session.StandardManager.load(StandardManager.java:321)
      at org.apache.catalina.session.StandardManager.start(StandardManager.java:643)
      at org.apache.catalina.core.ContainerBase.setManager(ContainerBase.java:438)
      at org.apache.catalina.core.StandardContext.start(StandardContext.java:4559)
      at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
      at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
      at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
      at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:905)
      at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:740)
      at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:500)
      at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
      at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
      at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
      at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
      at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
      at org.apache.catalina.core.StandardService.start(StandardService.java:519)
      at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
      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 org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
  Caused by: java.io.NotSerializableException: com.oe.ws.beans.CardBean
      at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1180)
      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
      at java.util.ArrayList.writeObject(ArrayList.java:673)
      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.invokeWriteObject(ObjectStreamClass.java:959)
      at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1480)
      at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
      at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
      at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
      at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1551)
      at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:994)
      at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:523)
      at org.apache.catalina.session.StandardManager.unload(StandardManager.java:469)
      at org.apache.catalina.session.StandardManager.stop(StandardManager.java:673)
      at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4774)
      at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:924)
      at org.apache.catalina.startup.HostConfig.undeployApps(HostConfig.java:1319)
      at org.apache.catalina.startup.HostConfig.stop(HostConfig.java:1290)
      at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:323)
      at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
      at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1086)
      at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1098)
      at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:450)
      at org.apache.catalina.core.StandardService.stop(StandardService.java:587)
      at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)
      at org.apache.catalina.startup.Catalina.stop(Catalina.java:648)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:615)
      ... 6 more
  </code></pre>