distributed systemsadvancedReddit r/ExperiencedDevs thread with 400+ upvotesMAX
Leader Election Split-Brain in Multi-Region Control Planes : State Divergence and Merge Integrity Under Concurrent Writers
GoetcdgRPCPrometheus
Problem Breakdown
The fundamental defect is that shared mutable state is updated by concurrent writers whose operations are only serialized after the fact, at reconciliation time. When a multi-region control plane loses its inter-region consensus link, both datacenter partitions run leader election concurrently and each promotes itself…
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