ReplCoordExtern is spamming server logs

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    • Type: Bug
    • Resolution: Won't Do
    • Priority: Major - P3
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    • Affects Version/s: 7.0.15
    • Component/s: Replication
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      6 replicas per shard, 3 being hidden. This is a 12 shard cluster and it's seen on most shards hidden replicas. 

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      6 replicas per shard, 3 being hidden. This is a 12 shard cluster and it's seen on most shards hidden replicas. 
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      Upgrading mongo sharded clusters from v6.0.12 to v7.0.15 we're seeing logs being spammed with this particular message. They are causing issues with disk space on the hidden replicas and general logging pipelines in production environments. This was not an issue on v6.0.12.

      {"t":{"$date":"2025-06-02T00:46:38.808+00:00"},"s":"I",  "c":"REPL",     "id":3873109, "ctx":"ReplCoordExtern-0","msg":"Cannot select sync source because it is hidden","attr":{"syncSourceCandidate":"HOSTNAME_REDACTED:27017"}}

              Assignee:
              Kenan Ali
              Reporter:
              Todd Vernick
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                Created:
                Updated:
                Resolved: