yarn.resourcemanager.cluster-id is set to a constant. This value is visible
and correct on each RM's /conf page; however, the "Cluster ID" on
/cluster/cluster page is a timestamp. Each RM has a different "Cluster ID"
on /cluster/cluster. Similarly, the cluster id that is embedded in
application id's is the one that matches /cluster/cluster.

The ZK fence for HA seems to be working as expected.

Are these two cluster ids the same thing, or is the term cluster id
overloaded?

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