Hi Team
We are facing Performance issue with OpenJPA-3.1.1 when we deploy our application in EAP 7.3 Server but similar issue is not replicated with Wildfly-10.1.0 server with same version.
Below is reply from RED-HAT Team memeber we have received
With the scope of WFLY-7075 (see [1]) the 'TransactionScopedEntityManager' implementation got updated to throw an error if a jta transaction already has an UNSYNCHRONIZED persistence context and a SYNCHRONIZED persistence context is requested. For this the implementation is using the 'EntityManagerFactory', see: ~~~ private static void testForMixedSynchronizationTypes(EntityManagerFactory emf, EntityManager entityManagerFromJTA, String scopedPuName, final SynchronizationType targetSynchronizationType, Map targetProperties) { boolean skipMixedSyncTypeChecking = Configuration.skipMixedSynchronizationTypeCheck(emf, targetProperties); // extension to allow skipping of check based on properties of target entity manager boolean allowJoinedUnsyncPersistenceContext = Configuration.allowJoinedUnsyncPersistenceContext(emf, targetProperties); // extension to allow joined unsync persistence context to be treated as sync persistence context ... } ~~~ Printing the stack in 'EntityManagerFactoryImpl.' shows: 11698 ragedesign INFO [default task-1] openjpa.Runtime - org.apache.openjpa.persistence.EntityManagerFactoryImpl.getProperties(EntityManagerFactoryImpl.java:125) 11698 ragedesign INFO [default task-1] openjpa.Runtime - org.jboss.as.jpa.config.Configuration.skipMixedSynchronizationTypeCheck(Configuration.java:345) So, the code above calls 'EntityManagerFactoryImpl.getProperties(...)' from OpenJPA, see: ~~~ @Override public Map<String,Object> getProperties() { Map<String,Object> props = _factory.getProperties(); // convert to user readable values props.putAll(createEntityManager().getProperties()); return props; } ~~~ As you can see this code is creating a new 'EntityManager' (createEntityManager()) on every invocation just to get the Properties. As mentioned in the beginning to resolve the issue for JBoss EAP 7.3 and Open JPA, you would need to fix this in Open JPA
They have also shared link for Jira of JBOSS
https://issues.redhat.com/browse/WFLY-7075
I am attaching Project and logs for reference.
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