zghong opened a new pull request, #68757:
URL: https://github.com/apache/doris/pull/68757
### What problem does this PR solve?
Issue Number: close #68750
Problem Summary:
Concurrent first joins to the same colocate group can both observe the group
as absent, allowing incompatible distribution types or overwriting initial
backend placement. Journal replay can consequently reconstruct different
membership or placement.
This change makes schema validation and admission atomic, initializes
placement once across ALTER/CREATE/RESTORE, and orders journal submissions with
metadata changes. Replica-allocation updates lock tables before the colocate
index and revalidate membership. Unit and regression tests cover concurrent
admission and replay consistency.
### Release note
Fix concurrent colocate-group admission accepting incompatible tables or
overwriting initial backend placement, causing inconsistencies after journal
replay.
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [x] Regression test
- [x] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] 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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