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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

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java.lang.NullPointerException at java.util.Hashtable.put(Hashtable.java:380) at weblogic.servlet.internal.session.ClusteredSessionContextImpl.getJdbcProps(ClusteredSessionContextImpl.java:138) at weblogic.servlet.internal.session.ClusteredSessionContextImpl.getNewSession(ClusteredSessionContextImpl.java:51) at weblogic.servlet.internal.session.SessionContext.getNewSessionInstance(SessionContext.java:113) at weblogic.servlet.internal.ServletRequestImpl.getNewSession(ServletRequestImpl.java:1448) at weblogic.servlet.internal.ServletRequestImpl.getSession(ServletRequestImpl.java:1301) at jsp_servlet._session._jspService(_session.java:86) at weblogic.servlet.jsp.JspBase.service(JspBase.java:27) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:208) at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:1127) at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:1529) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)