Consumer Rebalance Storm

A rolling deploy is restarting consumer instances one at a time, and each individual restart is triggering a full consumer group rebalance — the whole group pauses, partitions get reassigned, and consumption resumes, only for the next restart to trigger another one. The group is spending more time rebalancing than actually processing messages, even though every individual consumer reports healthy. Diagnose the churn and stabilize the group before effective throughput collapses entirely.

Difficulty

Staff

Expected Time

~15 min

Category

Messaging & Streaming