The reason is unregistered BouncyCastle. The issue came with https://github.com/jbossas/jboss-eap/pull/892/ See the discussion and build problems in the https://github.com/jbossas/jboss-eap/pull/892/ Using https://github.com/jbossas/jboss-eap/pull/852 instead will fix it.
After xalan upgrade to redhat-7, this seems to me 100% failure. Including in https://bugzilla.redhat.com/show_bug.cgi?id=eap62-cp03-blockers as this is 100% regression. Xalan upgrade: https://bugzilla.redhat.com/show_bug.cgi?id=1091999 ( Upgrade xalan to 2.7.1.redhat-7 from 2.7.1.redhat-6 )
There was a partiall commit( part of 6.3 change ) commited to 6.2.x: https://github.com/baranowb/jboss-eap/commit/dc5ecf74dc151906d1b45f4d1153e6130e382944
PR: https://github.com/jbossas/jboss-eap/pull/1289 Upstream: https://bugzilla.redhat.com/show_bug.cgi?id=1054106 Upstream PR: https://github.com/jbossas/jboss-eap/pull/852 WFLY: https://issues.jboss.org/browse/WFLY-2760 WFLY PR: not listed in issue. Commit: https://github.com/wildfly/wildfly/commit/3e1ed3403a42067d01ff388c645426cb947562f3 Merged.
Verified for EAP 6.2.3.CP.CR2.