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• controller.quorum.fetch.timeout.ms

  • Type: int (ms)

  • Lower bound: 1000 ms (enforced)

  • Default: unchanged (2000ms)

  • Behavior: Values < 1000 ms are invalid and will be rejected with a clear error message.

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• Unit tests for config validation (values below/at/above 1000).

Rejected Alternatives

1. Do not change the limitation:

   • Maybe cause the system unavailable if users' configuration is wrong.

2. Make raft max fetch wait configurable instead:

   • Out of scope here. Even if exposed, we would still need a minimum for the timeout to maintain a robust ratio.