As per the Platform Support Guide Pega version 7.1.7 is supported on JBoss 6.3.x. We are planning to upgrade to JBoss 6.4. We wanted to check if we needed to upgrade the base Pega version to 7.1.9 on which AES is deployed or would AES deployed on Pega base version 7.1.7 still be a supported version on JBoss 6.4
Pega 7.1.7 has not been tested with JBoss EAP 6.4 and thus it is not mentioned in the platform support guide as well. For official support, it is best to upgrade to 7.1.9 if you are upgrading to JBoss EAP 6.4.
it is ideal to upgrade to 7.1.9, but if that is not possible, it is very likely JBoss 6.4 works with 7.1.7 as well as 6.4 is a minor bug fix release from redhat. Of course, Pega reserves the right not to support if there are any major issues.