一些错误需要知道

这是什么错误，在jsp网页源码上显示的

Stacktrace:

org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:410)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)

javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

</pre>
<b>root cause</b> <pre>java.lang.IllegalStateException

org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:435)

org.apache.jsp.control_jsp._jspService(control_jsp.java:111)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)

javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

</pre>
<b>note</b> <u>The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.