[Build Failure] test_direct_client_maintains_pool_to_arbiter is flaky

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    • Type: Build Failure
    • Resolution: Done
    • Priority: Minor - P4
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    • Affects Version/s: None
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      Name of Failure:

      test_direct_client_maintains_pool_to_arbiter

      Link to task:

      https://spruce.mongodb.com/task/mongo_python_driver_pyopenssl_macos_test_standard_rapid_python3.14_sync_noauth_nossl_standalone_patch_ad1167d01ea03780bae1fdb66ddc88283ce9a983_68fb845a5b57f10007a5ff3e_25_10_24_13_52_09/tests?execution=0&sorts=STATUS%3AASC

      Context of when and why the failure occurred:

      Consistently flaky test.

      Stack trace:

       [2025/10/24 07:11:29.821] FAILURE: AssertionError: 0 != 1 ()
 [2025/10/24 07:11:29.821] self = <test.test_client.TestClientPool testMethod=test_direct_client_maintains_pool_to_arbiter>
 [2025/10/24 07:11:29.821]     @client_context.require_connection
 [2025/10/24 07:11:29.821]     def test_direct_client_maintains_pool_to_arbiter(self):
 [2025/10/24 07:11:29.821]         listener = CMAPListener()
 [2025/10/24 07:11:29.821]         c = MockClient.get_mock_client(
 [2025/10/24 07:11:29.821]             standalones=[],
 [2025/10/24 07:11:29.821]             members=["a:1", "b:2", "c:3"],
 [2025/10/24 07:11:29.821]             mongoses=[],
 [2025/10/24 07:11:29.821]             arbiters=["c:3"],  # c:3 is an arbiter.
 [2025/10/24 07:11:29.821]             host="c:3",
 [2025/10/24 07:11:29.821]             directConnection=True,
 [2025/10/24 07:11:29.821]             minPoolSize=1,  # minPoolSize
 [2025/10/24 07:11:29.821]             event_listeners=[listener],
 [2025/10/24 07:11:29.821]         )
 [2025/10/24 07:11:29.821]         self.addCleanup(c.close)
 [2025/10/24 07:11:29.821]     
 [2025/10/24 07:11:29.821]         wait_until(lambda: len(c.nodes) == 1, "connect")
 [2025/10/24 07:11:29.821]         self.assertEqual(c.address, ("c", 3))
 [2025/10/24 07:11:29.821]         # Assert that we create 1 pooled connection.
 [2025/10/24 07:11:29.821]         listener.wait_for_event(monitoring.ConnectionReadyEvent, 1)
 [2025/10/24 07:11:29.821]         self.assertEqual(listener.event_count(monitoring.ConnectionCreatedEvent), 1)
 [2025/10/24 07:11:29.821]         arbiter = c._topology.get_server_by_address(("c", 3))
 [2025/10/24 07:11:29.821] >       self.assertEqual(len(arbiter.pool.conns), 1)
 [2025/10/24 07:11:29.821] E       AssertionError: 0 != 1
 [2025/10/24 07:11:29.821] test/test_client.py:2649: AssertionError

            Assignee:
            Noah Stapp
            Reporter:
            Noah Stapp
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              Created:
              Updated:
              Resolved: