"ARJUNA016009: Caught:: java.lang.NullPointerException" for Xid from Oracle XAResource in JBoss EAP

Issue

Encountering a repeated warning in the JBoss server.log

... WARN  [com.arjuna.ats.jta] (Periodic Recovery) ARJUNA016009: Caught:: java.lang.NullPointerException
        at com.arjuna.ats.jta.xa.XidImple.copy(XidImple.java:190)
        at com.arjuna.ats.jta.xa.XidImple.<init>(XidImple.java:69)
        at com.arjuna.ats.internal.jta.recovery.arjunacore.RecoveryXids.contains(RecoveryXids.java:153)
        at com.arjuna.ats.internal.jta.recovery.arjunacore.RecoveryXids.updateIfEquivalentRM(RecoveryXids.java:203)
        at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.refreshXidScansForEquivalentXAResourceImpl(XARecoveryModule.java:861)
        at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.xaRecoveryFirstPass(XARecoveryModule.java:629)
        at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.periodicWorkFirstPass(XARecoveryModule.java:189)
        at com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.doWorkInternal(PeriodicRecovery.java:765)
        at com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.run(PeriodicRecovery.java:377)