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Rick Curtis commented on OPENJPA-1454: -------------------------------------- Does setting openjpa.DynamicEnhancementAgent=false in your p.xml fix the problem? > 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 > > 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. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.