zclllyybb opened a new pull request, #65301:
URL: https://github.com/apache/doris/pull/65301
### What problem does this PR solve?
Issue Number: N/A
Related PR: #65288
Problem Summary:
This is the branch-4.0 backport of #65288.
The backend tablets schema scanner reads tablet rowset metadata while
compaction can rewrite the same rowset maps under the tablet header lock. That
can race when the scanner calculates rowset-derived columns such as size,
version count, segment count, compaction score, update time, and overlap state.
This change snapshots the tablet scalar fields, rowset metadata pointers,
and max-version rowset while holding the tablet header shared lock, then
releases the lock before aggregating rowset-derived values and filling the
output block. The branch-4.0 scanner uses the older `exec/schema_scanner` path
and does not have row-binlog rowset metadata, so this backport snapshots
`all_rs_metas()` only.
### Release note
None
### Check List (For Author)
- Test:
- Manual test
- `PATH=/mnt/disk6/common/ldb_toolchain_toucan/bin:$PATH
./build-support/clang-format.sh`
- `PATH=/mnt/disk6/common/ldb_toolchain_toucan/bin:$PATH
./build-support/check-format.sh`
- `git diff --check`
- `GIT_ALLOW_PROTOCOL=file ./build.sh --be -j 90`
- Behavior changed: No
- Does this need documentation: No
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