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From "Donald Woods (JIRA)" <>
Subject [jira] Updated: (OPENJPA-1590) Agent enhancer doesn't work with Tomcat
Date Mon, 22 Mar 2010 20:41:27 GMT


Donald Woods updated OPENJPA-1590:

    Fix Version/s: 2.1.0

> Agent enhancer doesn't work with Tomcat
> ---------------------------------------
>                 Key: OPENJPA-1590
>                 URL:
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: integration, UnenhancedClasses
>    Affects Versions: 2.0.0-M3
>            Reporter: Jeremy Bauer
>             Fix For: 2.1.0
> Originally reported as OPENJPA-1410 - Class linkage exception when creating an EMF with
OpenJPA M3
> Experimentation and a quick search for similar issues is showing that use of the OpenJPA's
agent enhancer with Tomcat never worked?!? The agent gets tied to the base class loader and
enhances classes available to that loader at startup. Each app has their own lazily instantiated
class loader. Enhancement has already taken place by the time those loaders get instantiated.
This looked like a regression, but it it is actually a separate and much larger issue than
the one raised in this JIRA. I will not pursue that issue at this time. 
> Please verify that you no longer see the original problem/exception with latest 2.0 build.
If you were relying on runtime enhancement you will need to re-enable it by specifying:
> <property name="openjpa.RuntimeUnenhancedClasses" value="supported"/>
> A more recommended solution is to enhance your entities at build time and set -
> <property name="openjpa.DynamicEnhancementAgent" value="false"/>
> <property name="openjpa.RuntimeUnenhancedClasses" value="unsupported"/> 

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