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Posted to dev@openjpa.apache.org by "Donald Woods (JIRA)" <ji...@apache.org> on 2010/11/02 22:19:07 UTC
[jira] Resolved: (OPENJPA-1454) InstrumentationFactory crashes the
tomcat WebappClassLoader by injecting org.apache.openjpa classes into the
SystemClassLoader
[ https://issues.apache.org/jira/browse/OPENJPA-1454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Donald Woods resolved OPENJPA-1454.
-----------------------------------
Resolution: Fixed
no response since including the bval spec in openjpa-all, so closing. please open a new JIRA if more work is needed.
> InstrumentationFactory crashes the tomcat WebappClassLoader by injecting org.apache.openjpa classes into the SystemClassLoader
> ------------------------------------------------------------------------------------------------------------------------------
>
> Key: OPENJPA-1454
> URL: https://issues.apache.org/jira/browse/OPENJPA-1454
> Project: OpenJPA
> Issue Type: Bug
> Components: UnenhancedClasses
> Affects Versions: 2.0.0-M3
> Reporter: Mark Struberg
> Assignee: Donald Woods
> Fix For: 2.1.0
>
>
> The InstrumentationFactory tries to find the jar containing the manifest with the pre-main and attaches this jar to the VM.
> This has the side effect that all classes which get loaded via the Instrumentation are added to the 'classes' Vector of the SystemClassLoader. And this causes a problem when running OpenJPA in a WebApplication - because the SystemClassLoader only contains a few of those class definitions, and e.g. executing
> public void setBrokerFactory(BrokerFactory factory) {
> _factory = new DelegatingBrokerFactory(factory,
> PersistenceExceptions.TRANSLATOR);
> }
> crashes the WebApp because org.apache.openjpa.util.Exceptions is available in the SystemClassLoader but the dependent J2DoPrivHelper is not.
> This is even more problematic when using openjpa-lib, openjpa-kernel, etc as single jars (instead of openjpa-all), because in this case only openjpa-kernel gets injected into the VMs system classpath - causing the agent to subsequently crash because all the classes from openjpa-lib obviously cannot be found.
> This might also be an explanation to a few other open JIRAs I've read through the last few days.
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