A test of https://github.com/wildfly/wildfly-core/pull/2956 showed a hang in ServerManagementTestCase. I haven't thought about it hard but I doubt the PR is relevant to the hang.

Hang was in job https://ci.wildfly.org/viewLog.html?buildId=98516&buildTypeId=WildFlyCore_PullRequest

I'll attach the the thread dump from that log. It looks like server reload-one is not shutting down while the shutdown hook waits for the ServiceContainer to terminate. No other threads in that process are doing anything interesting so it is hard to o much about this, as we don't have ServiceContainer state info.