Warning: Stop Cache Nodes Last.
When you stop a cache node, all running inference nodes also appear as inactive in MM and cannot be stopped using MM. This is the expected behavior.
When you restart all cache nodes, the running inference nodes will appear as active again after some time. You may have to re-log on to MM Console before the display is correct.
When you stop all engines in a cluster, make sure you stop the cache nodes after stopping all other types of nodes.