shuke987 opened a new pull request, #65577:
URL: https://github.com/apache/doris/pull/65577

   ### What problem does this PR solve?
   
   Issue Number: None
   
   Related PR: #62805
   
   Problem Summary:
   
   `FrontendServiceImplTest` starts a non-cloud mocked FE and BE for its shared
   fixture. However,
   `testGetTabletReplicaInfosNullJobReturnsCancelledWithoutNpe` temporarily sets
   `Config.cloud_unique_id`, which switches the process-wide environment to 
cloud
   mode.
   
   If the background heartbeat runs during that window, it enters the cloud
   heartbeat path with a non-cloud `SystemInfoService`. The resulting failed
   heartbeat marks the shared mock BE not alive, so later table-creation tests
   intermittently fail with zero available backends.
   
   Move this cloud-specific test to `FrontendServiceImplCloudTest`, which has no
   `MockedFrontend` or mock BE fixture. The original `getTabletReplicaInfos`
   request and `CANCELLED` assertions remain unchanged, so test coverage is
   preserved while the global cloud-mode change is isolated from the background
   heartbeat.
   
   ### Release note
   
   None
   
   ### Check List (For Author)
   
   - Test
       - [ ] 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
   
     Validation on latest `master`:
     - `./run-fe-ut.sh --run 
org.apache.doris.service.FrontendServiceImplCloudTest`: 1 test passed
     - `./run-fe-ut.sh --run org.apache.doris.service.FrontendServiceImplTest`: 
18 tests passed
   
   - Behavior changed:
       - [x] No.
       - [ ] Yes.
   
   - Does this need documentation?
       - [x] No.
       - [ ] Yes.
   
   ### Check List (For Reviewer who merge this PR)
   
   - [ ] Confirm the release note
   - [ ] Confirm test cases
   - [ ] Confirm document
   - [ ] Add branch pick label
   


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