Hi, In my custom RealmResourceProviderFactory, I do roughly the following:     @Override    public void postInit(KeycloakSessionFactory factory) {        KeycloakModelUtils.runJobInTransaction(factory, (KeycloakSession session) -> {            List<RealmModel> realms = session.realms().getRealms();            ... });    }); Full code here: https://github.com/dteleguin/custom-admin-roles Everything worked fine with 2.1.x, but after upgrade to 2.2.x startup fails in roughly about 50% cases: Caused by: java.sql.SQLException: IJ031017: You cannot set autocommit during a managed transaction at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.setJdbcAutoCom mit(BaseWrapperManagedConnection.java:994) at org.jboss.jca.adapters.jdbc.WrappedConnection.setAutoCommit(WrappedConn ection.java:787) at org.hibernate.resource.jdbc.internal.AbstractLogicalConnectionImplement or.begin(AbstractLogicalConnectionImplementor.java:67) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin (LogicalConnectionManagedImpl.java:238) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLo calTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcRe sourceLocalTransactionCoordinatorImpl.java:214) at org.hibernate.engine.transaction.internal.TransactionImpl.begin(Transac tionImpl.java:52) at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:15 12) at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:4 5) Full stacktrace here: http://pastebin.com/ETtPqXQk In the other half of cases, everything goes fine just like before, so it's a kind of heisenbug. Any ideas? Could it be some concurrency issue when my code is executed in parallel with some other DB-related code? could it be JTA related? Dmitry