zclllyybb opened a new pull request, #65288:
URL: https://github.com/apache/doris/pull/65288
### What problem does this PR solve?
Issue Number: N/A
Related PR: N/A
Problem Summary:
`information_schema.backend_tablets` reads tablet rowset metadata while
compaction can rewrite the rowset maps under the tablet header lock. The
scanner also derives fields such as tablet size, version count, segment count,
compaction score, update time, and overlap state from those rowset maps or the
max-version rowset.
This PR takes a short shared tablet header lock per tablet, snapshots the
rowset metadata pointers, row-binlog metadata pointers, max-version rowset
pointer, and scalar tablet fields, then releases the lock before doing
aggregation and filling the result block. This keeps the scanner synchronized
with compaction without holding the lock during block materialization.
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [x] Manual test (add detailed scripts or steps below)
- `git diff --check`
- `GIT_ALLOW_PROTOCOL=file ./build.sh --be -j 90`
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [x] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [x] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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