[patch/serverless-fix] More reliable trigger for security index migration (#139028)#139040
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elasticsearchmachine merged 1 commit intoelastic:patch/serverless-fixfrom Dec 4, 2025
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We always want to trigger an index migration if one is required. However, we previously would only do that if we detected a change to the state of the security index on the master node. But a rolling upgrade might not cause a detectable change in index state - for example, in a cluster with dedicated masters nodes, if those nodes were upgraded last, then all index relocation would happen before the masters knew about the new migration (so they couldn't trigger it) and once the masters were upgraded they would detect that nothing had changed so never send a "security index changed" event and never trigger the migration task. Now, we say that if a security index exists, and it requires migration then it also triggers a change event
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jfreden
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elasticsearchmachine
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Backports the following commits to patch/serverless-fix: