Don't know if this is exactly the same issue, but some class loader bugs
in 4.0.3 have been fixed in 4.0.4-b2 -- you should give that a try
instead.

Craig


On Thu, 2 May 2002, Dmitri Lysenko wrote:

> Date: Thu, 2 May 2002 10:43:54 +1000
> From: Dmitri Lysenko <[EMAIL PROTECTED]>
> Reply-To: Tomcat Users List <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> Subject: java.lang.VerifyError while using struts with Tomcat 4.0.x
>
> Hi,
>
> I'm using tomcat 4.0.3 integrated with JBoss 2.4.4 (they run in the same
> JVM).  Struts framework is used to handle the presentation logic.
> This combination works fine with Tomcat 3.x.
> However after I upgrated to the Tomcat 4.0.3 I'm experiencing the
> java.lang.VerifyError (Incompartible argument for a function) while the
> ActionServlet instanciates some action classes.  I'm sure that the problem
> caused by the changes in the tomcat's classloader. I had the situation when
> the class with the same name is accessible by two different classloaders. I
> found out that the problem appears if the class is loaded by the classloader
> that's different with the one that the current thread uses. In this situation
> I had this VerifyError. I was able to resolve the problem by eliminating the
> class duplication, now I have no two same classes that are placed in the
> different jars. However the question is why this error appears? The situation
> that I had when the same class is accessible by multiple class loaders is not
> prohibited by the Java language. I'm wondering what classloader contraint was
> violated.
>
> To fix the problem I have to use the jar's packaging that's not very
> convenient for me. So I appreciate any help that allows me to resolve this
> problem in better way.
>
> Dmitri Lyssenko,
> [EMAIL PROTECTED]
>
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