mohak1 opened a new pull request, #13805:
URL: https://github.com/apache/trafficserver/pull/13805

   Catch2 runs the `abuse_shield` config cases as separate processes. On 
unfixed `master`, a 10-minute `ctest -j12` loop failed after 4,172 suite 
iterations when one process removed another's temporary YAML file:
   
   ```
   YAML parse error in rate-limited file .../rate_limited.yaml: bad file
   ```
   
   The test helper derived directory names only from `steady_clock`. Create 
each directory atomically with `mkdtemp()` so parallel processes cannot share 
it.
   
   Under the same 10-minute stress test, the fix completed 5,100 suite 
iterations (61,200 case executions) without failure. Another 1,000 parallel 
repetitions passed after rebasing onto current `master`.
   
   Fixes: #13750


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