See recent comment https://developer.jboss.org/message/950898#950898

Status.STATUS_COMMITTING:
Status.STATUS_COMMITTED:
Status.STATUS_PREPARED:
Status.STATUS_PREPARING:

• Someone has called commit in parallel and the transaction is trying to commit so try to commit too: call tm.commit

I think that TimerCMTTxInterceptor/LifecycleCMTTxInterceptor are using CMTTxInterceptor.endTransaction(), so they shouldn't need changes.