Java.lang.VerifyError when using ant 1.6.2

Question

In short, I get the VerifyError when deploying my .ear in Weblogic 8.1 SP2. I have nailed down the issue to this:
I compile all my code using Ant 1.6.2. If I package the code up using ant 1.6.2 I get the VerifyError. If I pacakge the code up using ant 1.4, all is well. Note that when I deploy the 1.6.2 packaged ear file on Windows, all is well also.
During the ant package target I assembly the war and ear using the core war and ear tasks.
We are using precompiled JSPs in the war file. It seems that WL8.1 wants to recompile the JSP file. I am not sure why - the ant 1.4 packaged ear does not want to recompile the same JSP.
The detailed error is:
Servlet class jsp_servlet._portal.__capitalmarketsoverview for servlet /portal/CapitalMarketsOverview.jsp could not be verified.
java.lang.VerifyError: (class: jsp_servlet/_portal/__capitalmarketsoverview, method: _jspService signature: (Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V) Incompatible object argument for function call.>
Any help is appreciated,
Harry Duin

Answer 1

Hello,
I could not find an easy way to get the wls version of ant to start using the tasks you mention from ant 1.6.2.
I tried defining the tasks using taskdef and also adding them to wls ant.jar and updating the deafult.properties file but the ant complained about unexpected elements in the build.xml file where I added the new tags (e.g import)
If your really up against it you can try adding wls tasks to ant 1.6.2, they are listed here:
http://e-docs.bea.com/wls/docs81/toolstable/ToolsTable.html#1009580
Although I could not located exactly which jar they are in. Good luck.
Cheers
Hussein Badakhchani
www.orbism.com