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java.lang.NullPointerException at weblogic.servlet.internal.session.SessionData.<init>(SessionData.java:117) at weblogic.servlet.internal.session.MemorySessionData.<init>(MemorySessionData.java:9) at weblogic.servlet.internal.session.MemorySessionContext.getNewSession(MemorySessionContext.java:19) at weblogic.servlet.internal.ServletRequestImpl.getNewSession(ServletRequestImpl.java:2111) at weblogic.servlet.internal.ServletRequestImpl.getSession(ServletRequestImpl.java:1925) at jsp_servlet.__saludo._jspService(__saludo.java:80) at weblogic.servlet.jsp.JspBase.service(JspBase.java:27) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:304) 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)