添加日志报错，使用struts+tomcat+log4j

qiulu1001

程序报错如下：
java.lang.NoSuchFieldError: DEBUG
        org.apache.commons.logging.impl.Log4JCategoryLog.debug(Log4JCategoryLog.java:139)
        org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:543)
        org.apache.jsp.index_jsp._jspService(index_jsp.java:42)
        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:285)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:232)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:856)