Zookeeper missing leader critical
Zookeeper cluster has no node marked as leader
>>>
sum
(
) == 0
The query sum(zk_server_leader) == 0 adds up the zk_server_leader metric across all Zookeeper instances; if the total is zero, it means no instance reports itself as the leader. The alert fires when this condition holds, indicating the cluster currently has no elected leader.
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