Getting WARN ARJUNA016009 "java.lang.ArrayIndexOutOfBoundsException: 0" during Periodic Recovery on EJBTransactionRecoveryService in JBoss EAP 6

Issue

The following WARN "java.lang.ArrayIndexOutOfBoundsException: 0" at EJBTransactionRecoveryService.getXAResources in Periodic Recovery was shown during EAP 6 startup:

WARN  [com.arjuna.ats.jta] (Periodic Recovery) ARJUNA016009: Caught:: java.lang.ArrayIndexOutOfBoundsException: 0
    at org.jboss.as.ejb3.remote.EJBTransactionRecoveryService.getXAResources(EJBTransactionRecoveryService.java:92)
    at com.arjuna.ats.internal.jbossatx.jta.XAResourceRecoveryHelperWrapper.getXAResources(XAResourceRecoveryHelperWrapper.java:51) [jbossjts-integration-4.17.7.Final-redhat-4.jar:4.17.7.Final-redhat-4]
    at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.resourceInitiatedRecoveryForRecoveryHelpers(XARecoveryModule.java:500) [jbossjts-jacorb-4.17.7.Final-redhat-4.jar:4.17.7.Final-redhat-4]
    at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.periodicWorkFirstPass(XARecoveryModule.java:158) [jbossjts-jacorb-4.17.7.Final-redhat-4.jar:4.17.7.Final-redhat-4]
    at com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.doWorkInternal(PeriodicRecovery.java:743) [jbossjts-jacorb-4.17.7.Final-redhat-4.jar:4.17.7.Final-redhat-4]
    at com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.run(PeriodicRecovery.java:371) [jbossjts-jacorb-4.17.7.Final-redhat-4.jar:4.17.7.Final-redhat-4]