org.drools.persistence.session.SingleSessionCommandService, line 287:

public synchronized <T> T execute(Command<T> command) {
try

{ txm.begin(); ... ... ... // omitted for clarity txm.commit(); return result; }

catch ( Exception t1 ) {
try

{ txm.rollback(); <<<<<<<<<<<<<< IF THERE IS A PROBLEM DURING ROLLBACK, THE REAL EXCEPTION ( "t1" ) IS EATEN. }

catch ( Exception t2 )

{ throw new RuntimeException( "Could not commit session or rollback", <<<<< THIS IS THROWN, BUT "t1" IS IGNORED t2 ); }

throw new RuntimeException( "Could not commit session",
t1 );
} finally {
if ( command instanceof DisposeCommand )

{ this.jpm.dispose(); }

}
}