There should be added information about bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=952746 to release notes. The note says that distributed jta works in chapter http://documentation-devel.engineering.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/6.2/html-single/Development_Guide/index.html#About_Java_Transaction_Service_JTS But there is this exception mentioned in BZ - in specific case the distributed JTA fails to do crash recovery correctly.
Closing as no longer relevant (6.2.0 Release Notes)
Reopening and assigning to Docs Lead
To progress this ticket I have flagged BZ#1018812 as requiring a release notes entry for JBoss EAP 6.3.0. In checking the status of this BZ ticket, it seems that the circumstances of the issue have not yet been confirmed, therefore I am not confident it can be accurately described yet.
Closing as BZ#952746 did make it into the EAP 6.3.0 release notes.