Hibernate - Forcing container resource cleanup on transaction completion

Question

After a few queries get executed I'm getting the following message from Hibernate:

HHH000106: Forcing container resource cleanup on transaction completion

Everything seems to be working fine, there are no errors, but I haven't found any explanation as to what this message means, or if I should do anything about it.

I'm using Hibernate/JPA with JTA global transactions.

Any ideas?

Answer 1

(To complete xwoker's answer.)

The resources we are talking about are:

• ResultSet
• Statement

This message occurs because you left some of those resources open i.e. you didn't call their close() method. Due to the current ConnectionReleaseMode: those resources became useless and Hibernate informs you that it is calling the close() method for you.

To avoid this log: just call the close() method (on your ResultSet(s) and Statement(s)) yourself before the end of the transaction.

Answer 2

This message is produced in the org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl (at least is that the only place I found it used) and is declared as INFO:

public void afterTransaction() {
    transactionTimeOutInstant = -1;
    if ( connectionReleaseMode() == ConnectionReleaseMode.AFTER_STATEMENT ||
            connectionReleaseMode() == ConnectionReleaseMode.AFTER_TRANSACTION ) {
        if ( hasRegisteredResources() ) {
            LOG.forcingContainerResourceCleanup();
            releaseResources();
        }
        getLogicalConnection().aggressiveRelease();
    }
}

If certain ConnectionReleaseModes are used and there are registered resources, Hibernate informs you, that it releases these resources.

If this is the desired behaviour, don't do anything about it.