This is needed to resolve potential startup issues in a JBoss cluster configuration that were fixed in EAP 6.4. Currently, we support onl EAP 6.2
IM r12.6 SP4, SP5 and SP6 releases now support JBoss EAP 6.4. We have updated IM r12.6 SP4, SP5 and SP6 Platform Support Matrixes with this information @
Hopefully, certifying r12.6 SP4 would also mean certification for later service packs.