Servlet.service() for servlet jsp threw exceptio java.lang.NullPointerExcep

[Jiten@energos]

2012-03-23 10:42:08 StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exceptio java.lang.NullPointerException
    at org.apache.jsp.jsp.TitleFrame_jsp._jspService(TitleFrame_jsp.java:66)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:284)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:257)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
    at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:245)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:199)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:184)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:164)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:156)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)
    at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:206)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:833)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:732)
    at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:619)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:688)
    at java.lang.Thread.run(Thread.java:536)

I am getting this error in my project.
Please any one know how to resolve this error.

Whenever i am getting this error i ahve to restart tomcat and i dont want to restart tomcat
please give me some proper solution.

-Jiten