Issue

We had a problem while modifying a server group configuration (a simple jvm property). The jboss-cli seemed to freeze, and the domain controller had to be killed and restarted.
Once the DC restarted, the host controllers were unable to reconnect. Even restarting partially or completely the host controllers was ineffective
We tried basically everything from restoring older snapshots to rebooting the domain controller machine.

At the end we tried to kill every single java based process on every host controller machine.This, somehow, solved the problem and we're looking for a correlation with one of the monitoring agents.