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kvserver: circuit-break replicas when liveness not reachable #74616

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kvserver: circuit-break replicas when liveness not reachable#74616
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A-kvAnything in KV that doesn't belong in a more specific category.C-enhancementSolution expected to add code/behavior + preserve backward-compat (pg compat issues are exception)T-kvKV TeamX-staleno-issue-activity
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@tbg
tbg
opened on Jan 10, 2022

Touches #33007.

As of #71806, replicas generally fail fast when they're unable to replicate commands in a timely manner. However, when the liveness range is unavailable (or not reachable from a replica), this property does not hold (as documented in a test case in TestReplicaCircuitBreakers referencing this issue). This is somewhat similar (though only in spirit) to #74503.

Jira issue: CRDB-12174

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