Xml file created during EJB Timer operation in JBoss EAP 7

Issue

Some xml files are getting created in jBosss path due to which getting error - could not restore timer from server:

12:12:44,486 ERROR [org.jboss.as.ejb3.timer] (EJB default - 5) WFLYEJB0029: Could not restore timer from $JBOSS_HOME/standalone/data/example_timer.a_timer_ejb.TimerServiceBean/random_190787.xml: com.ctc.wstx.exc.WstxUnexpectedCharException: Illegal character (NULL, unicode 0) encountered: not valid in any content
 at [row,col {unknown-source}]: [1,1]
    at com.ctc.wstx.sr.StreamScanner.constructNullCharException(StreamScanner.java:646)
    at com.ctc.wstx.sr.StreamScanner.throwInvalidSpace(StreamScanner.java:670)
    at com.ctc.wstx.sr.StreamScanner.throwInvalidSpace(StreamScanner.java:661)
    at com.ctc.wstx.sr.StreamScanner.getNextAfterWS(StreamScanner.java:831)
    at com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:2110)
    at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1181)
    at com.ctc.wstx.sr.BasicStreamReader.nextTag(BasicStreamReader.java:1204)
    at org.jboss.staxmapper.XMLMapperImpl.parseDocument(XMLMapperImpl.java:74)
    at org.jboss.as.ejb3.timerservice.persistence.filestore.FileTimerPersistence.loadTimersFromFile(FileTimerPersistence.java:371)
    at org.jboss.as.ejb3.timerservice.persistence.filestore.FileTimerPersistence.getTimers(FileTimerPersistence.java:334)
    at org.jboss.as.ejb3.timerservice.persistence.filestore.FileTimerPersistence.access$500(FileTimerPersistence.java:81)
    at org.jboss.as.ejb3.timerservice.persistence.filestore.FileTimerPersistence$PersistTransactionSynchronization$1.run(FileTimerPersistence.java:463)
    at org.jboss.as.ejb3.timerservice.persistence.filestore.FileTimerPersistence$PersistTransactionSynchronization$1.run(FileTimerPersistence.java:455)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.jboss.as.ejb3.timerservice.persistence.filestore.FileTimerPersistence$PersistTransactionSynchronization.afterCompletion(FileTimerPersistence.java:455)
    at org.jboss.as.txn.service.internal.tsr.JCAOrderedLastSynchronizationList.afterCompletion(JCAOrderedLastSynchronizationList.java:144)
    at org.wildfly.transaction.client.AbstractTransaction.performConsumer(AbstractTransaction.java:223)
    at org.wildfly.transaction.client.AbstractTransaction$AssociatingSynchronization.afterCompletion(AbstractTransaction.java:306)
    at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.afterCompletion(SynchronizationImple.java:96)
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.afterCompletion(TwoPhaseCoordinator.java:545)
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:101)
    at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:162)
    at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1288)
    at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:126)
    at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:89)
    at org.wildfly.transaction.client.LocalTransaction.commitAndDissociate(LocalTransaction.java:77)
    at org.wildfly.transaction.client.ContextTransactionManager.commit(ContextTransactionManager.java:71)
    at org.jboss.as.ejb3.timerservice.TimerServiceImpl$TaskPostPersist.persistTimer(TimerServiceImpl.java:1248)
    at org.jboss.as.ejb3.timerservice.TimerServiceImpl.persistTimer(TimerServiceImpl.java:622)
    at org.jboss.as.ejb3.timerservice.TimerTask.run(TimerTask.java:152)
    at org.jboss.as.ejb3.timerservice.TimerServiceImpl$Task$1.run(TimerServiceImpl.java:1299)
    at org.wildfly.extension.requestcontroller.RequestController$QueuedTask$1.run(RequestController.java:494)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
    at org.jboss.threads.JBossThread.run(JBossThread.java:485)