tomacat报错：ERROR http-80-Processor19: - Servlet.service() for servlet default threw exception

tomcat服务器在运行一段时间后抛出：
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/].[jsp] ERROR http-80-Processor19: - Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
        at com.opensymphony.xwork.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:512)
        at com.opensymphony.xwork.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:342)
        at com.opensymphony.xwork.TextProviderSupport.getText(TextProviderSupport.java:212)
        at com.opensymphony.xwork.ActionSupport.getText(ActionSupport.java:103)
        at com.opensymphony.webwork.components.Text.end(Text.java:142)
        at com.opensymphony.webwork.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:21)
        at org.apache.jsp.search_jsp._jspx_meth_ww_005ftext_005f3(search_jsp.java:850)
        at org.apache.jsp.search_jsp._jspx_meth_ww_005fiterator_005f0(search_jsp.java:566)
        at org.apache.jsp.search_jsp._jspService(search_jsp.java:231)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:691)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:469)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:403)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
        at com.opensymphony.webwork.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:114)
        at com.opensymphony.webwork.dispatcher.WebWorkResultSupport.execute(WebWorkResultSupport.java:143)
        at com.opensymphony.xwork.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:313)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:208)
        at com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:175)
        at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:115)
        at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.webwork.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:174)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.webwork.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:169)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:151)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:186)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
        at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:116)
        at com.opensymphony.webwork.dispatcher.DispatcherUtils.serviceAction(DispatcherUtils.java:273)
        at com.opensymphony.webwork.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
        at java.lang.Thread.run(Thread.java:595)
请问有谁见过如此错误？该如何解决？谢谢了！