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docs: add SBP (Search Backpressure) bug fix report for v2.16.0#2411

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tkykenmt merged 1 commit intomainfrom
docs/sbp-search-backpressure-v2.16.0
Jan 15, 2026
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docs: add SBP (Search Backpressure) bug fix report for v2.16.0#2411
tkykenmt merged 1 commit intomainfrom
docs/sbp-search-backpressure-v2.16.0

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Summary

This PR adds documentation for the Search Backpressure (SBP) bug fix included in OpenSearch v2.16.0.

Reports Created

  • Release report: docs/releases/v2.16.0/features/opensearch/sbp-search-backpressure.md
  • Feature report: docs/features/opensearch/opensearch-search-backpressure.md (created)

Key Changes in v2.16.0

  • Fixed bug in SBP cancellation logic where tasks were incorrectly cancelled based on heap usage when node was under CPU duress
  • Introduced resource-wise cancellation - tasks are now cancelled based on the specific resource causing node duress
  • Refactored SearchBackpressureService with new NodeDuressTrackers and TaskResourceUsageTrackers classes

Related

@tkykenmt tkykenmt merged commit 0cd5f08 into main Jan 15, 2026
@tkykenmt tkykenmt deleted the docs/sbp-search-backpressure-v2.16.0 branch January 15, 2026 12:09
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