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ddl: close lightning writers after the import is complete (#39879) #39916

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This is an automated cherry-pick of #39879

What problem does this PR solve?

Issue Number: close #39800

Problem Summary:

When the import is completed, the memory allocated by the lightning writers is not explicitly released. This is fine in normal cases, but when CGO is used to allocate the memory, the leakage happened.

What is changed and how it works?

As the title said.

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

Please refer to Release Notes Language Style Guide to write a quality release note.

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ti-chi-bot commented Dec 14, 2022

[REVIEW NOTIFICATION]

This pull request has been approved by:

  • Benjamin2037
  • hawkingrei

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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@ti-chi-bot ti-chi-bot added do-not-merge/cherry-pick-not-approved release-note-none Denotes a PR that doesn't merit a release note. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. type/cherry-pick-for-release-6.5 This PR is cherry-picked to release-6.5 from a source PR. labels Dec 14, 2022
@sre-bot sre-bot added the cherry-pick-approved Cherry pick PR approved by release team. label Dec 14, 2022
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LGTM

@ti-chi-bot ti-chi-bot added the status/LGT1 Indicates that a PR has LGTM 1. label Dec 14, 2022
@ti-chi-bot ti-chi-bot added status/LGT2 Indicates that a PR has LGTM 2. and removed status/LGT1 Indicates that a PR has LGTM 1. labels Dec 14, 2022
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/merge

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This pull request has been accepted and is ready to merge.

Commit hash: fc5a039

@ti-chi-bot ti-chi-bot added the status/can-merge Indicates a PR has been approved by a committer. label Dec 14, 2022
@ti-chi-bot ti-chi-bot merged commit 5cdc753 into pingcap:release-6.5 Dec 14, 2022
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5 participants