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https://issues.apache.org/jira/browse/GERONIMO-5553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12903393#action_12903393
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Donald Woods commented on GERONIMO-5553:
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I checked with Jeremy on the OpenJPA team yesterday and he agreed that the
openjpa.RuntimeUnenhancedClasses property is ignored for the javaagent code and
only used for dynamic runtime enhancement (subclassing), so setting that value
in the EMF Map should not be required and is discouraged, as we tell OpenJPA
users all the time NOT to use dynamic runtime enhancement.
For the javaagent, classLoadEnhancement=true is the default, which controls
whether OpenJPA load-time class enhancement should be available in this JVM
execution.
Starting in OpenJPA 2.0 - If a javaagent is not provided via the command line
and OpenJPA is running on the Sun 1.6 SDK or IBM 1.6 JDK (SR8+), OpenJPA will
attempt to dynamically load the runtime Enhancer. This support is provided as
an ease of use feature and it is not recommended for use in a production
system. Setting the property openjpa.DynamicEnhancementAgent to false will
disable this function.
When then dynamic enhancer is loaded, the following informational message is
logged:
[java] jpa.enhancement INFO [main] openjpa.Runtime - OpenJPA dynamically
loaded the class enhancer. Any classes that were not enhanced at build time
will be enhanced when they are loaded by the JVM.
So, is another module (like a deployer, annotation scanner or Tomcat) possibly
loading the classes before the OpenJPA GBean is being loaded and having a
chance to register the TransformerAgent?
> Fail to enchance entities on Geronimo
> -------------------------------------
>
> Key: GERONIMO-5553
> URL: https://issues.apache.org/jira/browse/GERONIMO-5553
> Project: Geronimo
> Issue Type: Bug
> Security Level: public(Regular issues)
> Components: persistence
> Affects Versions: 3.0
> Environment: OS:win xp
> Geronimo :3.0 20100824 build
> Reporter: Lu Jiang
> Assignee: Rick McGuire
> Fix For: 3.0
>
> Attachments: booknew.war
>
>
> I tried to deploy a simple jpa sample on geronimo.But when persist data into
> database.
> Following exception will occur.
> <openjpa-2.0.0-r422266:935683 nonfatal user error>
> org.apache.openjpa.persistence.ArgumentException: Attempt to cast instance
> "org.apache.sample.entities.b...@97781f" to PersistenceCapable failed.
> Ensure that it has been enhanced.
> FailedObject: org.apache.sample.entities.b...@97781f
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