[jboss-jira] [JBoss JIRA] (AS7-4552) JBoss AS 7 produces non-transactional (autocommit) EntityManager within transactional EJB methods when using 3rd party javax.sql.DataSource via @DataSourceDefinition

[Craig Ringer (JIRA)]

Craig Ringer created AS7-4552:
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             Summary: JBoss AS 7 produces non-transactional (autocommit) EntityManager within transactional EJB methods when using 3rd party javax.sql.DataSource via @DataSourceDefinition
                 Key: AS7-4552
                 URL: https://issues.jboss.org/browse/AS7-4552
             Project: Application Server 7
          Issue Type: Bug
          Components: EJB, JPA / Hibernate, Transactions
    Affects Versions: 7.1.1.Final
         Environment: java version "1.7.0_01"
Java(TM) SE Runtime Environment (build 1.7.0_01-b08)
Java HotSpot(TM) 64-Bit Server VM (build 21.1-b02, mixed mode)

Linux ayaki.localdomain 3.3.0-4.fc16.x86_64 #1 SMP Tue Mar 20 18:05:40 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

            Reporter: Craig Ringer
            Assignee: jaikiran pai


When using a javax.sql.DataSource via @DataSourceDefinition to create the JTA datasource for a persistence unit, transactional EJB business methods run without transactions. No warning or error is emitted.

Business method calls annotated @TransactionAttribute(TransactionAttributeType.REQUIRED) receive an EntityManager that *is in autocommit mode*, ie is *not* in a transaction.

This violates the EJB3 spec and is a nasty problem.

I discovered this when testing some code that uses deferred constraints to create two interdependent database objects; record A must have at least one record B referencing it, but record B also has a foreign key reference to record A. This can be satisfied only with deferred constraints, and works fine in SQL-level testing. When testing with Arquillian at the JBoss AS 7 / Hibernate / JPA level, though, it was breaking.

Further investigation showed that the entity manager was in autocommit despite the method being transactional, as demonstrated by a test that tries to create and fetch from a cursor.

The attached self-contained test case demonstrates this issue. I'll be working on testing the issue against H2 or Derby next, but wanted to get this report in here first.

Even if this proves to be an issue with PostgreSQL's javax.sql.DataSource implementation, JBoss AS 7 clearly has some validation and checking to do because it *must* not allow an autocommit entity manager to be injected for transactional business methods.

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