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Raft: add logging about read index failure (#10494)#10516

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Raft: add logging about read index failure (#10494)#10516
ti-chi-bot wants to merge 1 commit intopingcap:release-8.5from
ti-chi-bot:cherry-pick-10494-to-release-8.5

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@ti-chi-bot ti-chi-bot commented Oct 30, 2025

This is an automated cherry-pick of #10494

What problem does this PR solve?

Issue Number: close #10495

Problem Summary:

What is changed and how it works?

Raft: add logging about read index failure
*  also add a comment about one of the reason why read index timeout may happen

Check List

Tests

  • Unit test
  • Integration test
  • Manual test (add detailed scripts or steps below)
  • No code

Side effects

  • Performance regression: Consumes more CPU
  • Performance regression: Consumes more Memory
  • Breaking backward compatibility

Documentation

  • Affects user behaviors
  • Contains syntax changes
  • Contains variable changes
  • Contains experimental features
  • Changes MySQL compatibility

Release note

None

@JaySon-Huang @ti-chi-bot
This is an automated cherry-pick of pingcap#10494
eff8c61 
Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>
@ti-chi-bot ti-chi-bot added do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. release-note-none Denotes a PR that doesn't merit a release note. size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. type/cherry-pick-for-release-8.5 This PR is cherry-picked to release-8.5 from a source PR. labels Oct 30, 2025
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ti-chi-bot commented Oct 30, 2025

@JaySon-Huang This PR has conflicts, I have hold it.
Please resolve them or ask others to resolve them, then comment /unhold to remove the hold label.

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ti-chi-bot bot commented Oct 30, 2025

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ti-chi-bot bot commented Oct 30, 2025

[APPROVALNOTIFIER] This PR is NOT APPROVED

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@ti-chi-bot ti-chi-bot bot added size/XXL Denotes a PR that changes 1000+ lines, ignoring generated files. and removed size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. labels Oct 30, 2025
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ti-chi-bot bot commented Oct 30, 2025

@ti-chi-bot: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name Commit Details Required Rerun command
pull-unit-test eff8c61 link true /test pull-unit-test
pull-integration-test eff8c61 link true /test pull-integration-test

Full PR test history. Your PR dashboard.

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@JaySon-Huang JaySon-Huang mentioned this pull request Oct 30, 2025
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JaySon-Huang commented Oct 30, 2025

changes are merged to #10515

@ti-chi-bot ti-chi-bot bot added cherry-pick-approved Cherry pick PR approved by release team. and removed do-not-merge/cherry-pick-not-approved labels Oct 30, 2025
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cherry-pick-approved Cherry pick PR approved by release team. do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. release-note-none Denotes a PR that doesn't merit a release note. size/XXL Denotes a PR that changes 1000+ lines, ignoring generated files. type/cherry-pick-for-release-8.5 This PR is cherry-picked to release-8.5 from a source PR.

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