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From "Matthew Jacobs (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IMPALA-5708) Test failure with invalid GetExecSummary; potential coord. race
Date Mon, 24 Jul 2017 20:50:00 GMT
Matthew Jacobs created IMPALA-5708:
--------------------------------------

             Summary: Test failure with invalid GetExecSummary; potential coord. race
                 Key: IMPALA-5708
                 URL: https://issues.apache.org/jira/browse/IMPALA-5708
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 2.10.0
            Reporter: Matthew Jacobs
            Priority: Critical
         Attachments: impalad.log, profile.b64

A jenkins test job failed in 
{code}
query_test.test_queries.TestHdfsQueries.test_union[exec_option: {'batch_size': 0, 'num_nodes':
0, 'disable_codegen_rows_threshold': 0, 'disable_codegen': True, 'abort_on_error': 1, 'exec_single_node_rows_threshold':
0} | table_format: seq/bzip/block] (from pytest)
{code}

with the following stack trace in the pytest:

{code}
query_test/test_queries.py:90: in test_union
    result = self.execute_query(query_string, vector.get_value('exec_option'))
common/impala_test_suite.py:506: in wrapper
    return function(*args, **kwargs)
common/impala_test_suite.py:531: in execute_query
    return self.__execute_query(self.client, query, query_options)
common/impala_test_suite.py:598: in __execute_query
    return impalad_client.execute(query, user=user)
common/impala_connection.py:160: in execute
    return self.__beeswax_client.execute(sql_stmt, user=user)
beeswax/impala_beeswax.py:194: in execute
    result.exec_summary = self.get_exec_summary(handle)
beeswax/impala_beeswax.py:213: in get_exec_summary
    self.__build_summary_table(summary, 0, False, 0, False, output)
beeswax/impala_beeswax.py:252: in __build_summary_table
    for stats in node.exec_stats:
E   TypeError: 'NoneType' object is not iterable
{code}

It looks to me like the returned ExecSummary is wrong or invalid. Nothing very obvious in
the logs (attached a snip that I believe is the relevant portion), and I found the profile
that was written to the profile log (attached as well). I suspect something may be wrong with
the profile because CM doesn't seem to decode it: when I loaded the encoded profile in the
CM debug tool "impalaProfileDecoder" (e.g. http://cm-host:7180/cmf/debug/impalaProfileDecoder
), there was no profile details, and exporting as text resulted in a file that just said "Unknown
profile.". A next step would be to try to decode the profile in some other way to check validity.



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