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Date: Fri, 6 Mar 2009 09:27:56 -0800 (PST)
From: "Jeremy Bauer (JIRA)" <jira@apache.org>
To: dev@openjpa.apache.org
Subject: [jira] Commented: (OPENJPA-932) Runtime enhancer doesn't work
 propery if there is a trailing persistence.xml file on the classpath.
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    [ https://issues.apache.org/jira/browse/OPENJPA-932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12679657#action_12679657 ] 

Jeremy Bauer commented on OPENJPA-932:
--------------------------------------

Comments on patch dated 2009-03-06 08:24 AM:

- I don't think a new trace group should be added specifically for this warning.  (OpenJPA trace groups are well documented in the manual, so if a new group would need to be doc'd if consensus is that a new group should be added.).  While this exception shows up during enhancement, it is in product derivation code so openjpa.Runtime may be better?

- I'm still struggling a bit with constructing a new config to get a logger, but OpenJPA doesn't really have anything configured at this point and I can't think of a cleaner way to get this important warning out there without other potentially messy changes.  The null check is good, IMHO.  The comment regarding its necessity can be removed.

- The error message isn't completely clear as to what the problem is or how to fix it.  I think wording which includes the notion that "persistence unit names should be unique" may help.  (I'd say must, but as this problem points out, we don't enforce it)

> Runtime enhancer doesn't work propery if there is a trailing persistence.xml file on the classpath.
> ---------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-932
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-932
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 1.2.0, 2.0.0-M1, 2.0.0
>            Reporter: Rick Curtis
>         Attachments: OPENJPA-932-2.0.patch
>
>
> I have an application where I am using runtime class enhancement via the javaagent and I set openjpa.RuntimeUnenhancedClasses=unsupported. My application works fine when running on 1.1.0 but when I moved to 1.2.0 (and 2.0.0) I started getting errors because my classes aren't being enhanced. 
> After debugging I determined that I had a jar on the end of my classpath that had a META-INF/persistence.xml file in it. The extra persistence.xml file has no PUs defined, and should have been ignored. When I removed that jar from my classpath things starting working again. It also works if I put my META-INF/persistence.xml file on the end of my classpath.

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