There are some builds failing consistently:

Main build:
http://narayanaci1.eng.hst.ams2.redhat.com/job/narayana/58/PROFILE=BLACKTIE,jdk=jdk8.latest,label=linux/console
Hanging here:

jboss.naming.context.java.JmsXA: javax.naming.NameNotFoundException: JmsXA – service jboss.naming.context.java.JmsXA
at org.jboss.as.naming.ServiceBasedNamingStore.lookup(ServiceBasedNamingStore.java:106)
at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:207)
at org.jboss.as.naming.InitialContext$DefaultInitialContext.lookup(InitialContext.java:235)
at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:193)
at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:189)
at javax.naming.InitialContext.lookup(InitialContext.java:417)
at javax.naming.InitialContext.lookup(InitialContext.java:417)
at org.codehaus.stomp.jms.StompConnect.createXAConnectionFactory(StompConnect.java:195)
at org.codehaus.stomp.jms.StompConnect.getXAConnectionFactory(StompConnect.java:84)
at org.codehaus.stomp.jms.StompConnect.assignProtocolConverter(StompConnect.java:64)
at org.codehaus.stomp.tcp.TcpTransportServer.run(TcpTransportServer.java:82)
at java.lang.Thread.run(Thread.java:745)

Release quickstarts:
http://narayanaci1.eng.hst.ams2.redhat.com/job/release-narayana-quickstarts/13/console
(similar error and shows

[exec] "Services that were unable to start:" => ["jboss.concurrent.ee.context.service.default"],
[exec] "Services that may be the cause:" => [
[exec] "jboss.iiop-openjdk.naming-service",
[exec] "jboss.iiop-openjdk.orb-service"

)