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Gossip Protocol Storms During Large Cluster Membership Churn : Cold-Path Replay and Backfill Correctness

Gohashicorp/memberlistprotobufPrometheus

Problem Breakdown

The vulnerable surface is the cold path: replay, backfill, and migration jobs that process historical data at scale, which every production system runs but almost none tests. SWIM-style gossip propagates membership changes at O(log n) rounds, but during mass scaling events (autoscaler adding 200 nodes in one tick) each…

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