java.lang.VerifyError

[lei zhang]

please , somebody can checked my proplem.....
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type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: (class: org/apache/tools/ant/taskdefs/optional/XMLValidateTask, method: createDTD signature: ()Lorg/apache/tools/ant/types/DTDLocation;) Incompatible argument to function
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:244)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
com.jl165.action.CodeFilter.doFilter(CodeFilter.java:66)
com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:142)
com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:58)


root cause

java.lang.VerifyError: (class: org/apache/tools/ant/taskdefs/optional/XMLValidateTask, method: createDTD signature: ()Lorg/apache/tools/ant/types/DTDLocation;) Incompatible argument to function
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Class.java:164)
org.apache.tools.ant.Project.init(Project.java:274)
org.apache.jasper.compiler.Compiler.getProject(Compiler.java:116)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:320)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:497)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:476)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:464)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
com.jl165.action.CodeFilter.doFilter(CodeFilter.java:66)
com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:142)
com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:58)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.
=====================

in logs ,i do not find the error message,how can i deal this...
thack you...


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