[jira] [Created] (IMPALA-8496) test_data_cache.py is flaky

["Michael Ho (JIRA)" <ji...@apache.org>]

Michael Ho created IMPALA-8496:
----------------------------------

             Summary: test_data_cache.py is flaky
                 Key: IMPALA-8496
                 URL: https://issues.apache.org/jira/browse/IMPALA-8496
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 3.3.0
            Reporter: Michael Ho
            Assignee: Michael Ho


The test failed intermittently like the following:
{noformat}
00:03:33 custom_cluster/test_data_cache.py:39: in test_data_cache
00:03:33     self.run_test_case('QueryTest/data-cache', vector, unique_database)
00:03:33 common/impala_test_suite.py:565: in run_test_case
00:03:33     update_section=pytest.config.option.update_results)
00:03:33 common/test_result_verifier.py:605: in verify_runtime_profile
00:03:33     actual))
00:03:33 E   AssertionError: Did not find matches for lines in runtime profile:
00:03:33 E   EXPECTED LINES:
00:03:33 E   row_regex: .*DataCacheHitCount: 6 \(6\).*
00:03:33 E   row_regex: .*DataCacheMissBytes: 0.*
00:03:33 E   row_regex: .*DataCacheMissCount: 0 \(0\).*
{noformat}

There were unexpected cache misses:
{noformat}
00:03:33 E            - DataCacheHitBytes: 6.33 MB (6635932)
00:03:33 E            - DataCacheHitCount: 5 (5)
00:03:33 E            - DataCacheMissBytes: 3.33 MB (3494957)
00:03:33 E            - DataCacheMissCount: 1 (1)
{noformat}



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