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https://issues.apache.org/jira/browse/WW-4646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16396629#comment-16396629
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Hedju Hor commented on WW-4646:
-------------------------------
Just a hint.
Weblogic Server 12.1.3 has a default installation of asm-3.1.jar in folder
...weblogic\oracle_common\modules\
after remove this jar Convention plugin works fine.
> remove ASM 3 from struts2
> -------------------------
>
> Key: WW-4646
> URL: https://issues.apache.org/jira/browse/WW-4646
> Project: Struts 2
> Issue Type: Bug
> Components: Core Actions, Plugin - Convention
> Affects Versions: 2.5
> Reporter: adam brin
> Assignee: Lukasz Lenart
> Priority: Major
> Fix For: 2.5.5
>
>
> Pulling from the discussion on the struts2-users list:
> Struts2 maintains two different versions of ASM 5x for the Convention plugin
> and 3x for the rest of struts. A basic search of the codebase suggests that
> the only direct uses of ASM are via the ClassFinder class in Xwork and used
> by the Convention plugin. Based on this
> [https://issues.apache.org/jira/browse/WW-4435] and
> [http://www.philvarner.com/2015/02/05/using-apache-cxf-2-7-struts2-2-3-and-asm-5-with-maven/],
> I wonder if it might make sense to:
> 1. remove the direct dependency on ASM entirely for XWork and Struts2 in
> general
> 2. move the ClassFinder class and direct dependencies the convention plugin
> and make them explicitly dependent on ASM 5x.
> 3. Like other apps like Spring, repackage/embed ASM into it's own package
> tree so it can live with other versions of ASM.
> -----
> the core issue for us is that there are overlaps between ASM 5 and ASM 3, and
> become explicit when launching our app with the maven-jetty-plugin. Classes
> with the same name in both packages though they have different groupIds and
> thus cause exceptions in startup either due to (a) Missing Classes like
> EmptyVisitor or (b) incompatible classes. It's our hope that by removing this
> dual dependency, we can take advantage of Java8 features and also simplify
> dependency management in our pom.
> thanks
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