deardeng opened a new pull request, #67640:
URL: https://github.com/apache/doris/pull/67640

   Problem Summary: Background checkpoint and HTTP /dump can write images 
concurrently. A static MetaWriter shares a mutable delegate between those 
writes, allowing one image's module indices to be recorded in another image. 
Checkpoint also renames the new file before reading it back. Stopping FE during 
that validation window can leave a corrupt image as the newest startup 
candidate and prevent restart.
   
   Give each write its own MetaWriter, validate the unpublished image.ckpt in a 
fresh checkpoint Env, and publish it only after validation succeeds. Failed 
validation cleans the temporary file and preserves the previous published 
image. Add deterministic concurrent writer and checkpoint publication unit 
tests.
   
   ### Release note
   
   Prevent concurrent checkpoint and metadata dump operations from sharing 
image indices, and keep unvalidated checkpoints out of FE startup image 
selection.
   
   ### Check List (For Author)
   
   - Test: Unit tests added but not run; compilation and test execution 
deferred to the user as requested. Checkstyle 9.3 with repository configuration 
and git diff --check passed.
   - Behavior changed: Yes. Checkpoint images become visible only after 
successful read-back validation.
   - Does this need documentation: No
   
   ### What problem does this PR solve?
   
   Issue Number: close #xxx
   
   Related PR: #xxx
   
   Problem Summary:
   
   ### Release note
   
   None
   
   ### Check List (For Author)
   
   - Test <!-- At least one of them must be included. -->
       - [ ] Regression test
       - [ ] 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:
       - [ ] No.
       - [ ] Yes. <!-- Explain the behavior change -->
   
   - Does this need documentation?
       - [ ] 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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