[Backport 3.8] [Memory Retention] Fix yellow cluster during rolling upgrade - #4940
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rithinpullela merged 1 commit intoJul 28, 2026
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… retention job on retention_enabled (opensearch-project#4937) Creating the jobs index from the first upgraded node strands its replica (replicas cannot be allocated to nodes older than the primary's node), leaving the cluster yellow for the whole rolling-upgrade window and failing downstream BWC tests. Only touch the jobs index when it already exists or when every node in the cluster is on at least this node's version; otherwise defer — the cluster state change from the last old node leaving re-runs the listener. Also require plugins.ml_commons.memory.retention_enabled (opt-in, default false) before creating the memory retention job. Signed-off-by: Erfan Ballew <ballewer@amazon.com> Co-authored-by: Erfan Ballew <ballewer@amazon.com> (cherry picked from commit bc8e96f) Signed-off-by: opensearch-ci-bot <opensearch-infra@amazon.com>
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Backport bc8e96f from #4937.