Friends, can you help me please, I have an application deployed on a JEE wildfly 8 to start with a user I have no problem but when I use more than one concurrent user have the following error

12:23:38,409 WARN  [com.arjuna.ats.arjuna] (Transaction Reaper) ARJUNA012117: TransactionReaper::check timeout for TX 0:ffffc0a83801:-4dbfde6b:559175cc:12d in state  RUN

12:23:38,412 WARN  [com.arjuna.ats.arjuna] (Transaction Reaper Worker 0) ARJUNA012095: Abort of action id 0:ffffc0a83801:-4dbfde6b:559175cc:12d invoked while multiple threads active within it.

12:23:38,412 WARN  [com.arjuna.ats.arjuna] (Transaction Reaper Worker 0) ARJUNA012108: CheckedAction::check - atomic action 0:ffffc0a83801:-4dbfde6b:559175cc:12d aborting with 1 threads active!

12:23:38,416 WARN  [com.arjuna.ats.arjuna] (Transaction Reaper Worker 0) ARJUNA012121: TransactionReaper::doCancellations worker Thread[Transaction Reaper Worker 0,5,main] successfully canceled TX 0:ffffc0a83801:-4dbfde6b:559175cc:12d