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Proposed Changes

Deprecating ClientQuotaCallback#updateClusterMetadata. No alternative method will be introduced, because the method showed no demand during its three-year absence before 4.0, and its reintroduced form contains multiple pitfalls that would require significant effort to fix.

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• While KIP-1162 proposes a redesign, we’re letting updateClusterMetadata take a nap for now—but if a real use case shows up, we’re ready to wake it up and bring it back!this approach adds considerable engineering cost and complexity, yet brings little practical benefit, as the method has seen almost no demand and the existing implementation already exposes multiple pitfalls.