laxmanmamididd commented on PR #7464:
URL: 
https://github.com/apache/datafusion-comet/pull/7464#issuecomment-6711824892

   fc3a4f2a1 closes a test-order race @sunchao reproduced on #7363. A close 
queued on the dispatcher's thread by one test could land after the next test 
reset the shared counters. `CometS3CredentialDispatcherTest` now waits for 
queued closes before each test resets and after each test, through a test-only 
`awaitQueuedClosesForTesting()`. Running the class 1,500 times in a row gave no 
failed runs.
   


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