CLI hangs when calling :count-messages on non-existent subscription. To reproducer the issue start server in standalone-full-ha.xml profile and in CLI run: /subsystem=messaging/hornetq-server=default/runtime-queue=clientId0.subscriberName0:count-messages Thread dumps attached.
Created attachment 893238 [details] threadump-server.txt
Created attachment 893239 [details] threadump-cli.txt
fixed in upstream by WFLY-2511 which removes the infinite loop that's hanging the CLI
Verified with EAP 6.3.0.ER8