freemandealer opened a new pull request, #63602:
URL: https://github.com/apache/doris/pull/63602

   Problem Summary: The old sync file cache clear path bypassed the normal 
FileBlock lifecycle and was not safe with concurrent cache users, while the 
async clear path only marked or enqueued deletes and returned before held 
blocks, recycle-queue deletes, and file-cache meta deletes were finished. This 
change makes the factory sync clear path use a synchronous wrapper over the 
async clear semantics. The wrapper serializes clear operations, pauses the TTL 
manager during clear, marks existing blocks for deletion, drains recycled 
blocks, waits for held deleting blocks to be released, and waits for file-cache 
meta delete fences before reporting completion. The direct clear helper is kept 
only for BE tests. HTTP sync clear now runs through a cancellable async reply 
path so client disconnects can cancel waiting without adding a clear timeout 
config.
   
   ### 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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