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  1. Python Driver
  2. PYTHON-5325

Test Failure - test.asynchronous.test_concurrency.TestAsyncConcurrency.test_concurrency

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    • Resolution: Done
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      Name of Failure:

      test.asynchronous.test_concurrency.TestAsyncConcurrency.test_concurrency

      Link to task:

      https://spruce.mongodb.com/task/mongo_python_driver_other_hosts_rhel8_zseries_test_6.0_standalone_auth_ssl_async_patch_e6a4a7145eccb0b6c76c84aa539f29b40f3424b3_67fec6138250720007260f95_25_04_15_20_49_09?execution=0&sortBy=STATUS&sortDir=ASC

      Context of when and why the failure occurred:

      test.asynchronous.test_concurrency.TestAsyncConcurrency.test_concurrency is inconsistent across platforms and host conditions. Its threshold should be lowered to ensure that failures represent code slowdowns and not platform variance.

      Stack trace:

       [2025/04/15 16:32:19.963] FAILURE: AssertionError: 51.85073760991477 not greater than or equal to 75 ()
 [2025/04/15 16:32:19.963] self = <test.asynchronous.test_concurrency.TestAsyncConcurrency testMethod=test_concurrency>
 [2025/04/15 16:32:19.963]     async def test_concurrency(self):
 [2025/04/15 16:32:19.963]         tasks = []
 [2025/04/15 16:32:19.963]         iterations = 5
 [2025/04/15 16:32:19.963]     
 [2025/04/15 16:32:19.963]         client = await self.async_single_client()
 [2025/04/15 16:32:19.963]         await client.db.test.drop()
 [2025/04/15 16:32:19.963]         await client.db.test.insert_one({"x": 1})
 [2025/04/15 16:32:19.963]     
 [2025/04/15 16:32:19.963]         start = time.time()
 [2025/04/15 16:32:19.963]     
 [2025/04/15 16:32:19.963]         for _ in range(iterations):
 [2025/04/15 16:32:19.963]             await self._task(client)
 [2025/04/15 16:32:19.963]     
 [2025/04/15 16:32:19.963]         sequential_time = time.time() - start
 [2025/04/15 16:32:19.963]         start = time.time()
 [2025/04/15 16:32:19.963]     
 [2025/04/15 16:32:19.963]         for i in range(iterations):
 [2025/04/15 16:32:19.963]             tasks.append(self._task(client))
 [2025/04/15 16:32:19.963]     
 [2025/04/15 16:32:19.963]         await asyncio.gather(*tasks)
 [2025/04/15 16:32:19.963]         concurrent_time = time.time() - start
 [2025/04/15 16:32:19.963]     
 [2025/04/15 16:32:19.963]         percent_faster = (sequential_time - concurrent_time) / concurrent_time * 100
 [2025/04/15 16:32:19.963]         # We expect the concurrent tasks to be at least 75% faster on all platforms as a conservative benchmark
 [2025/04/15 16:32:19.963] >       self.assertGreaterEqual(percent_faster, 75)
 [2025/04/15 16:32:19.963] E       AssertionError: 51.85073760991477 not greater than or equal to 75
 [2025/04/15 16:32:19.963] test/asynchronous/test_concurrency.py:54: AssertionError

            Assignee:
            noah.stapp@mongodb.com Noah Stapp
            Reporter:
            noah.stapp@mongodb.com Noah Stapp
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              Created:
              Updated:
              Resolved: