Ahmet Altay created BEAM-11314:
----------------------------------

             Summary: StreamingWordCountIT is flaky
                 Key: BEAM-11314
                 URL: https://issues.apache.org/jira/browse/BEAM-11314
             Project: Beam
          Issue Type: Bug
          Components: test-failures
            Reporter: Ahmet Altay
            Assignee: Yichi Zhang


Example: 
[https://ci-beam.apache.org/job/beam_PreCommit_Python_Commit/16401/consoleFull#gradle-task-235]
 (search for: py36:preCommitIT_streaming)

job link: 
https://console.cloud.google.com/dataflow/jobs/us-central1/2020-11-19_18_25_20-8827839168269537580?project=apache-beam-testing

Error:
 
======================================================================*18:16:37*
 FAIL: test_streaming_wordcount_it 
(apache_beam.examples.streaming_wordcount_it_test.StreamingWordCountIT)*18:16:37*
 
----------------------------------------------------------------------*18:16:37*
 Traceback (most recent call last):*18:16:37*   File 
"/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/apache_beam/examples/streaming_wordcount_it_test.py",
 line 107, in test_streaming_wordcount_it*18:16:37*     
save_main_session=False)*18:16:37*   File 
"/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/apache_beam/examples/streaming_wordcount.py",
 line 108, in run*18:16:37*     output | 
beam.io.WriteToPubSub(known_args.output_topic)*18:16:37*   File 
"/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/apache_beam/pipeline.py",
 line 568, in __exit__*18:16:37*     self.result = self.run()*18:16:37*   File 
"/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/apache_beam/pipeline.py",
 line 547, in run*18:16:37*     return self.runner.run_pipeline(self, 
self._options)*18:16:37*   File 
"/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/apache_beam/runners/dataflow/test_dataflow_runner.py",
 line 72, in run_pipeline*18:16:37*     hc_assert_that(self.result, 
pickler.loads(on_success_matcher))*18:16:37* AssertionError: *18:16:37* 
Expected: (Test pipeline expected terminated in state: RUNNING and Expected 500 
messages.)*18:16:37*      but: Expected 500 messages. Got 523 messages. Diffs 
(item, count):*18:16:37*   Expected but not in actual: dict_items([])*18:16:37* 
  Unexpected: dict_items([(b'125: 1', 1), (b'399: 1', 1), (b'480: 1', 1), 
(b'495: 1', 1), (b'120: 1', 1), (b'115: 1', 1), (b'203: 1', 1), (b'236: 1', 1), 
(b'243: 1', 1), (b'322: 1', 1), (b'268: 1', 1), (b'173: 1', 1), (b'425: 1', 1), 
(b'363: 1', 1), (b'182: 1', 1), (b'445: 1', 1), (b'44: 1', 1), (b'437: 1', 1), 
(b'199: 1', 1), (b'298: 1', 1), (b'261: 1', 1), (b'380: 1', 1), (b'473: 1', 
1)])*18:16:37*



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