The jbossjts-integration-4.17.23.Final.jar in EAP 6.4.0.DR7 doesn't have specification version in its manifest. For more information see BZ 900033
Resolved upstream: https://github.com/jbosstm/narayana/commit/1bfd9c0c25d4b254e11c1235133604f87e6c08f4
Verified with EAP 6.4.0.DR11