9:16 p.m.
Hi,
The following workaround has been checked in for EclipseLink M8 to work with JBoss 4.2.2
GA.
Container managed entities should predeploy/deploy and register now with/without static
weaving.
When the UCL3 classLoader no longer causes a NPE (See JIRA
http://jira.jboss.com/jira/browse/EJBTHREE-572 ) we will reenable dynamic weaving on EAR
predeploy().
http://bugs.eclipse.org/229634
Workaround:
---------------------------------
EclipseLink will use the non-temporary classLoader instead of the one from
getNewTempClassLoader() obtained from the JBoss PersistenceUnitInfo that throws a NPE on
loadClass() or Class.forName().
We require that JBoss implementers statically weave container managed entities and
reference JBoss as the target-server in persistence.xml.
Deployment Changes:
1) If weaving is required then static weave the entities before EAR packaging using either
the command-line weaver or the weaving ant task.
2) All persistence units deployed to the JBoss container must contain the following
property in persistence.xml or container managed entities will predeploy but fail to be
managed at runtime.
JBoss AS 4.2.2 GA debugging:
----------------------------------------------------------
I debugged the UCL3 NullPointerException into the JBoss AS 4.2.2 GA source into the
following segment of code.
In the following function the classloader parent tree is searched all the way to the root.
no clazz is returned and in the finally clause the last log.trace causes a
RuntimeException on a NPE.
Curious though that the line number in Logger.trace() does not correspond to the JDK 1.5
src.
package org.jboss.mx.loading
public abstract class RepositoryClassLoader extends URLClassLoader
public Class loadClass(String name, boolean resolve)
throws ClassNotFoundException
...
finally
...
--->NPE log.trace("loadClass " + this + " name=" + name + "
not found");
}
}
}
Thread [main] (Suspended)
UnifiedClassLoader3(RepositoryClassLoader).loadClass(String, boolean) line: 425
UnifiedClassLoader3(ClassLoader).loadClass(String) line: 251
UnifiedClassLoader3(ClassLoader).loadClassInternal(String) line: 319
Class.forName0(String, boolean, ClassLoader) line: not available [native method]
Class.forName(String, boolean, ClassLoader) line: 242
PrivilegedAccessHelper.getClassForName(String, boolean, ClassLoader) line: 85
XMLEntityMappings.getClassForName(String, ClassLoader) line: 120
XMLEntityMappings.getClassForName(String) line: 157
XMLEntityMappings.initPersistenceUnitClasses() line: 389
MetadataProcessor.initPersistenceUnitClasses() line: 188
MetadataProcessor.processEntityMappings() line: 298
Results:
--------
15:41:43,772 INFO [STDOUT] [EPS Warning]: 2008.05.02
15:41:43.755--Thread(Thread[main,5,jboss])--The temporary classLoader for
PersistenceLoadProcessor [helloworld] is not available. Switching classLoader to
[org.jboss.mx.loading.UnifiedClassLoader3@18b995c{
url=file:/C:/opt/jboss422/server/default/tmp/deploy/tmp13465jsfejb3.ear ,addedOrder=45}].
Weaving has been disabled for this session. EclipseLink may be unable to get a spec
mandated temporary class loader from the server, you may be able to use static weaving as
an optional workaround.
15:41:44,221 INFO [JmxKernelAbstraction] installing MBean:
jboss.j2ee:ear=jsfejb3.ear,jar=app.jar,name=TodoDao,service=EJB3 with dependencies:
15:41:44,221 INFO [JmxKernelAbstraction]
persistence.units:ear=jsfejb3.ear,jar=app.jar,unitName=helloworld
15:41:44,359 INFO [EJBContainer] STARTED EJB: TodoDao ejbName: TodoDao
15:42:45,344 INFO [STDOUT] [EPS Finer]: 2008.05.02
15:42:45.343--UnitOfWork(20862427)--Thread(Thread[http-127.0.0.1-8080-1,5,jboss])--TX
binding to tx mgr, status=STATUS_ACTIVE
15:42:45,344 INFO [STDOUT] [EPS Finest]: 2008.05.02
15:42:45.344--UnitOfWork(20862427)--Thread(Thread[http-127.0.0.1-8080-1,5,jboss])--Execute
query DoesExistQuery()
15:42:45,350 INFO [STDOUT] [EPS Finest]: 2008.05.02
15:42:45.350--UnitOfWork(20862427)--Thread(Thread[http-127.0.0.1-8080-1,5,jboss])--PERSIST
operation called on: Todo@15914f3.
thank you
/michael
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