how to fix the java.lang.VerifyError in a Tomcat 7 webapp

[Anjaiah Setty]

a webapp deployed to tomcat 7 is producing a java.lang.VerifyError when the user posts credentials from the login page to another JSP (please. see Error stack trace below).

the same webapp(.war) if deployed to tomcat 5.5 works just fine. Also, other webapps work just fine on this instance of tomcat 7.

I have tried eliminating unwanted .JAR files to see if I could identify any offensive JAR however could not isolate one yet.

How should I go about identifying the cause of the java.lang.VerifyError ?

Any tips, pointers appreciated

javax.servlet.ServletException: java.lang.VerifyError: (class: org/apache/jsp/ChLogin_jsp, method: _jspService signature: (Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V) Inconsistent stack height 0 != 1
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:343)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
web.AuthFilter.doFiltering(AuthFilter.java:74)
web.AuthFilter.doFilter(AuthFilter.java:58)
root cause

java.lang.VerifyError: (class: org/apache/jsp/ChLogin_jsp, method: _jspService signature: (Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V) Inconsistent stack height 0 != 1
java.lang.Class.getDeclaredConstructors0(Native Method)
java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
java.lang.Class.getConstructor0(Class.java:2699)
java.lang.Class.newInstance0(Class.java:326)
java.lang.Class.newInstance(Class.java:308)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:172)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
web.AuthFilter.doFiltering(AuthFilter.java:74)
web.AuthFilter.doFilter(AuthFilter.java:58)