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[release/v26.2.x] operator: settle each scale-down step before decommissioning the next (#1998) - #2024
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…#1998) Lowering statefulset.replicas by more than one broker deleted several broker Pods at once, and only the first was decommissioned. Since 1743490, reconcilePools no longer aborts the chain while CheckScale is false, so reconcileDecommission ran mid-scale. The previous step's terminating Pod was still LastPod, and its decommissioned broker looked already removed, so each pass patched away another broker without decommissioning it. Partitions with a majority on those brokers lost quorum. Fixes K8S-955. (cherry picked from commit fde0a00)
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