Re: [hibernate-dev] WildFly, JtaPlatform and Hibernate OGM
On 09/01/2014 07:20 AM, Gunnar Morling wrote:
Hi,
Running an OGM integration test on WildFly, I noticed that we work with
JBossStandAloneJtaPlatform. Shouldn't it rather be
JBossAppServerJtaPlatform in this case so we make use of the transaction
manager from the container?
org.hibernate.engine.transaction.jta.platform.internal.JBossAppServerJtaPlatform
sounds better.
So I thought it might help to add jipijapa-hibernate4-3.jar to the OGM
module, as it provides HibernatePersistenceProviderAdaptor which in turn
sets the JBossAppServerJtaPlatform. This works indeed, but unfortunately
HibernatePersistenceProviderAdaptor always bootstraps Hibernate ORM by
calling ORM's EMF builder.
There was a memory leak in Hibernate, see [1] [2] [3] for more details.
What'd be the right way to solve this problem? Have a specific JipiJapa
adaptor for OGM? Or could the existing one for ORM 4.3 actually be used if
it invoked the configured PersistenceProvider (HibernateOgmPersistence in
our case) rather than directly delegating to ORM's Bootstrap class?
No reason why there couldn't be a JipiJapa adaptor for OGM. One
question to answer is whether there will only be one JipiJapa adapter
for all versions of OGM or a different Jipi adaptor per OGM minor
release (as we do for ORM currently).
Currently, the JipiJapa release cycle tries to be in sync with the
WildFly schedule. At the moment, Jipi is lagging behind and needs to
catch up on feature development. The missing feature at the moment, is
enabling 2lc clustering via Jipi callbacks, that will allow more
persistence providers to cluster the 2lc (with WildFly). Currently, we
only allow the very latest supported Hibernate ORM 2lc to be clustered.
Scott
[1] https://issues.jboss.org/browse/JIPI-13 reverted the
https://issues.jboss.org/browse/JIPI-8 change due to memory leak.
[2] http://lists.jboss.org/pipermail/wildfly-dev/2013-July/000466.html
[3] https://hibernate.atlassian.net/browse/HHH-8363
(ClassLoaderServiceImpl should be defined as Stoppable)
[4]
https://github.com/wildfly/wildfly/blob/master/jpa/src/main/java/org/jbos...
Thanks,
--Gunnar
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