Error 500--Internal Server Error-Null Pointer Exception

[Gaurav Bahl]

When i am trying to logon to my application i got following error:-

at jsp_servlet._tiles.__layout._jspService(__layout.java:228)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at
weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStu
bImpl.java:996)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419
)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at
weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.ja
va:316)
at
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1033)
at
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.ja
va:269)
at
org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesReques
tProcessor.java:249)
at
org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestP
rocessor.java:303)
at
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1422)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:505)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStu
bImpl.java:996)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419
)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at
weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAp
pServletContext.java:6458)
at
weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.ja
va:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContex
t.java:3661)
at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:263
0)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)

--------------------------------------
But when i redeploy my application, and then try to login to my application it works fine.
This problem comes evertime when i restart my server. I am not supposed to redeploy my application manually evertime after i restart my server.
Can anybody suggest me why this problem is comming.

[Parameswaran Thangavel]

Hi Gaurav
Me too getting the same error, but unfortunately re-deploying the application too is not working for me. i donno where i am making the mistake.
i pastetd the stacktrace that i got


<Aug 1, 2006 9:09:09 PM GMT+05:30> <Error> <HTTP> <BEA-101020> <[ServletContext(id=1592123,name=reprocess_IATPA,con
text-path=/reprocess_IATPA)] Servlet failed with Exception
java.lang.NullPointerException
at jsp_servlet._web_45_inf._jsp.__error._jspService(__error.java:239)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:463)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:315)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:322)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:315)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:671
8)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)



Any idea???

[Rahul Mahindrakar]

Hi

Are you able to locate the .java file for the jsp and check which line is causing the problem

Are you debugging custom code or some packaged application

Br
Rahul