Thread: can't launch a jsp file from a servlet using request dispatcher, getting null pointer

what wuld be the problem?

Jan 13, 2012 5:43:54 PM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at org.apache.jsp.LoginSuccess_jsp._jspInit(LoginSucc ess_jsp.java:22)
at org.apache.jasper.runtime.HttpJspBase.init(HttpJsp Base.java:52)
at org.apache.jasper.servlet.JspServletWrapper.getSer vlet(JspServletWrapper.java:164)
at org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:338)
at org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.inv oke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.pro cessRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doF orward(ApplicationDispatcher.java:374)
at org.apache.catalina.core.ApplicationDispatcher.for ward(ApplicationDispatcher.java:302)
at com.saadhvi.registrationlogin.cntrl.LoginServlet.d oProcess(LoginServlet.java:58)
at com.saadhvi.registrationlogin.cntrl.LoginServlet.d oPost(LoginServlet.java:41)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invo ke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invok e(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.servic e(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(H ttp11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11Conn ectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run( JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)

i solved it ! jsp-api.jar is the problem, i removed it from the library, now its working fine !