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    Exception in thread "main" java.io.NotSerializableException: java.util.Hashtable$Enumerator at java.io.ObjectOutputStream.writeObject0(Unknown Source) at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) at java.io.ObjectOutputStream.writeSe

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java.lang.Object
java.io.NotSerializableException: java.lang.Object at java.io.ObjectOutputStream.outputObject(Unknown Source) at java.io.ObjectOutputStream.writeObject(Unknown Source) at java.io.ObjectOutputStream.outputClassFields(Unknown Source) at java.io.ObjectOutputStream.defaultWriteObject(Unknown Source) at java.io.ObjectOutputStream.outputObject(Unknown Source) at java.io.ObjectOutputStream.writeObject(Unknown Source) at java.io.ObjectOutputStream.outputClassFields(Unknown Source) at java.io.ObjectOutputStream.defaultWriteObject(Unknown Source) at java.io.ObjectOutputStream.outputObject(Unknown Source) at java.io.ObjectOutputStream.writeObject(Unknown Source) at weblogic.servlet.internal.AttributeWrapper.getObject(AttributeWrapper.java:92) at weblogic.servlet.internal.AttributeWrapper.getObject(AttributeWrapper.java:64) at weblogic.servlet.internal.session.SessionData.getAttribute(SessionData.java:384) at com.dhl.gis.gcdb.common.BaseServlet.isInSession(BaseServlet.java:401) at com.dhl.gis.gcdb.common.BaseServlet.hasNACEntity(BaseServlet.java:261) at com.dhl.gis.gcdb.common.BaseServlet.service(BaseServlet.java:101) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200) at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495) at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)