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java.lang.NullPointerException at examples.servlets.SessionServlet.doGet(SessionServlet.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) 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)