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<p style="margin: 10px 0 0 0; margin-top: 0">I meant in the failing Aries tests. Specifically I am wondering if somehow both bundles end up in org.hibernate.osgi.OsgiPersistenceProvider#osgiClassLoader.</p>
<p style="margin: 10px 0 0 0">I am not certain the scope of a org.hibernate.osgi.OsgiPersistenceProvider, but if it is created once then it sure seems dodgy to keep instance state related to bundles (org.hibernate.osgi.OsgiClassLoader#bundles) and their ClassLoaders (org.hibernate.osgi.OsgiClassLoader#classLoaders), let alone the caches of the loaded stuff (org.hibernate.osgi.OsgiClassLoader#classCache especially since that #classCache is keyed just by class-name.</p>
</blockquote> <p style="margin: 10px 0 0 0">This was a good instinct! Having stepped through the activation of the OSGiPersistenceProvider I see that the requesting bundle is not the persistence bundle, but in fact is org.apache.aries.jpa.container (The Aries JPA implementation). </p> <p style="margin: 10px 0 0 0">This means that only one org.hibernate.osgi.OsgiPersistenceProvider is ever created, and so the same OSGi ClassLoader is used all over the place! This bug hasn't shown up previously for two reasons:</p>
<ol>
<li>There aren't many OSGi tests that have clashing class names</li>
<li>Hibernate is unusual in creating a per-bundle PersistenceProvider (although perfectly within its rights to do so).</li>
</ol> <p style="margin: 10px 0 0 0">This now looks to me like the Aries JPA container might be the component doing the wrong thing. I'll raise a bug there and see what can be done.</p> </td>
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