Netty/JGroups versions should be in sync in EAP 7 and Artemis tag from which Artemis was built.

There is Netty 4.0.32 in EAP 7.0.0.ER7.
Artemis tag 1.1.0.wildfly-014 which is present in EAP 7.0.0.ER7 has dependency to Netty 4.0.30.

There is JGroups 3.6.8.Final in EAP 7.0.0.ER7.
Artemis tag 1.1.0.wildfly-014 which is present in EAP 7.0.0.ER7 has dependency to JGroups 3.6.0.Final.