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POsolution for java.lang.VerifyError in tomcat 7.0.23/jdk 1.6.x?
 

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  1. POsolution for java.lang.VerifyError in tomcat 7.0.23/jdk 1.6.x?
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    <p>When I deployed a maven 3.0.3 built webapp into tomcat 7.0.23 on Linux (java 1.6.x) and accessed posted my credentials in the login page, I got the following error. pom.xml references servlet 2.5, jsp 2.1 and JSTL 1.2.</p> <p>Why would I get this Error ? what can I do to avoid it ?</p> <p>I have other .war files deployed on the same tomcat instance and never faced this issue in those apps.</p> <p>The 1st JSP(login.jsp) that I did a http GET didn't throw an error. The POST from the 1st JSP to the 2nd Jsp(ChLogin.jsp) encountered the problem.</p> <p>=========================== <br><br> root cause</p> <pre><code>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) </code></pre> <p><strong>UPDATE 1</strong><br> the WEB-INF\lib of the webapp does NOT contain servlet, jsp or JSTL jars. It contains many application dependencies and spring jars (we use spring MVC). </p> <p><strong>UPDATE 2</strong><br> We don't pre-compile JSPs. That is a goal for another day, though.</p> <p><strong>UPDATE 3</strong><br> Discovered that this problem was not in tomcat 7.0.12, 7.0.14, 7.0.16 but started with 7.0.19. Posted to tomcat users mailing list. got a reply that it was perhaps the eclipse JDT compiler at fault. Verified that is indeed the case by replacing the compiler in tomcat 7.0.23/27 with tomcat 7.0.16's JDT compiler and LO &amp; BEHOLD, all is well. I am planning to write to the Eclipse JDT compiler team(if there is one) and post about this error.</p>
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    1. CODo you use any bytecode rewriting, aspect frameworks or java agents that might process the compiled jsps?
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    2. COWe are using the spring MVC library -- but these JSPs have not been configured for spring. Spring is setup to use a different URL path.
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    3. COI have the same .WAR file to Tomcat 5.5 and it works just fine. So, what am I missing ?
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