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[8.19] Deprecate indices.merge.scheduler.use_thread_pool setting (#129464) #129628

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Merged
merged 2 commits into from
Jun 18, 2025
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[8.19] Deprecate indices.merge.scheduler.use_thread_pool setting (#129464) #129628

merged 2 commits into from
Jun 18, 2025
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Backports the following commits to 8.19:

@albertzaharovits
Deprecate indices.merge.scheduler.use_thread_pool setting (elastic#12…
1efcf18 
…9464)

This deprecates the `indices.merge.scheduler.use_thread_pool` setting
that was introduced in
elastic#120869 because this
setting should not normally be used, unless instructed so by engineering
to get around temporary issues with the new threadpool-based merge
scheduler.
@albertzaharovits albertzaharovits added :Distributed Indexing/Engine Anything around managing Lucene and the Translog in an open shard. >deprecation auto-merge-without-approval Automatically merge pull request when CI checks pass (NB doesn't wait for reviews!) backport serverless-linked Added by automation, don't add manually Team:Distributed Indexing Meta label for Distributed Indexing team labels Jun 18, 2025
@elasticsearchmachine elasticsearchmachine mentioned this pull request Jun 18, 2025
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@elasticsearchmachine elasticsearchmachine merged commit 83dd930 into elastic:8.19 Jun 18, 2025
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@albertzaharovits albertzaharovits deleted the backport/8.19/pr-129464 branch June 18, 2025 14:50
@albertzaharovits albertzaharovits mentioned this pull request Jun 25, 2025
Merged
albertzaharovits added a commit that referenced this pull request Jun 25, 2025
@albertzaharovits
Adjust warning message for 8.x version in test (#129980)
6a50f48 
Deprecation warning messages are slightly different on the 8.* branch.
Somehow the warning message in this test was not covered by #129628 .

Fixes #129761
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auto-merge-without-approval Automatically merge pull request when CI checks pass (NB doesn't wait for reviews!) backport >deprecation :Distributed Indexing/Engine Anything around managing Lucene and the Translog in an open shard. serverless-linked Added by automation, don't add manually Team:Distributed Indexing Meta label for Distributed Indexing team v8.19.0

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@albertzaharovits @elasticsearchmachine