JBoss 7.1-struts1-java.lang.NullPointerException

我在我的jsp页面上有以下错误，并且不知道应该在哪里查找

     javax.servlet.ServletException: javax.servlet.jsp.JspException: java.lang.NullPointerException
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:858)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
    org.apache.jsp.jsp.layout.layout_jsp._jspService(layout_jsp.java:179)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:326)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:253)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
    org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1054)
    org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:292)
    org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:268)
    org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:329)
    org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
    org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858)
    nl.kb.idm.selfservice.Servlet.process(Servlet.java:145)
    nl.kb.idm.selfservice.Servlet.doGet(Servlet.java:90)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
    nl.kb.idm.selfservice.EncodingFilter.doFilter(EncodingFilter.java:42)
    nl.kb.idm.selfservice.CrossScriptingFilter.doFilter(CrossScriptingFilter.java:40)


root cause 

java.lang.NullPointerException
    org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
    ...

有人能给我指出正确的方向吗

亲切问候,，

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Jo

这些类型的bug可能很难找到。您可以做的一件事是将整个页面包装在异常处理程序中，如下所示：

<%
try {
%>

<!-- Your HTML and page logic here -->

<%
} catch(Throwable t) {
    t.printStackTrace();
}
%>

但是，请确保它不会进入生产环境，因为该页面中的所有异常都将进入您的stderr，而不是日志

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希望有帮助

如果没有代码，没有人能够帮助您..Show please your layout.jsp-当此jsp尝试包含其他资源时，会发生异常