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https://issues.apache.org/jira/browse/OPENJPA-78?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12494694
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Markus Wolf commented on OPENJPA-78:
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This problem also occurs when enhancing classes at build-time.
The workaround here is listing all classes on the commandline (or from
ant/maven) but this is a duplication of the class list.
> Automatic runtime enhancement only works when the class is listed in the
> first persistence-unit
> -----------------------------------------------------------------------------------------------
>
> Key: OPENJPA-78
> URL: https://issues.apache.org/jira/browse/OPENJPA-78
> Project: OpenJPA
> Issue Type: Bug
> Components: kernel
> Reporter: Marc Prud'hommeaux
> Priority: Minor
> Fix For: 0.9.8
>
>
> When multiple persistence-units are defined in the persistence.xml, only the
> first one is examined when looking for classes to enhance when using the
> automatic runtime enhancement (e.g., using the "-javaagent:openjpa.jar"
> argument). So if the project uses the following persistence.xml:
> <persistence xmlns="http://java.sun.com/xml/ns/persistence"; version="1.0">
> <persistence-unit name="unit1" transaction-type="RESOURCE_LOCAL">
> <class>unit1.SomeClass</class>
> </persistence-unit>
> <persistence-unit name="unit2" transaction-type="RESOURCE_LOCAL">
> <class>unit2.SomeClass</class>
> </persistence-unit>
> </persistence>
> In this example, when unit1.SomeClass is loaded, it will be enhanced, but
> unit2.SomeClass won't ever be enhanced.
> The only workaround is to list all of your persistent classes in an initial
> entry in the persistence-unit.
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