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https://issues.apache.org/jira/browse/IMPALA-14172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17982808#comment-17982808
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Riza Suminto commented on IMPALA-14172:
---------------------------------------
This AttributeError is probably safe to ignore since it came up from Impyla
(the test client).
> test_cancellation.py sees "'NoneType' object has no attribute 'columns'"
> ------------------------------------------------------------------------
>
> Key: IMPALA-14172
> URL: https://issues.apache.org/jira/browse/IMPALA-14172
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Affects Versions: Impala 5.0.0
> Reporter: Joe McDonnell
> Priority: Critical
> Labels: broken-build, flaky
>
> TestCancellationParallel.test_cancel_select hit this error:
> {noformat}
> query_test/test_cancellation.py:276: in test_cancel_select
> self.execute_cancel_test(vector)
> query_test/test_cancellation.py:191: in execute_cancel_test
> use_kill_query_statement=vector.get_value('use_kill_query_statement'))
> util/cancel_util.py:200: in cancel_query_and_validate_state
> thread, cancel_delay, join_before_close, use_kill_query_statement)
> util/cancel_util.py:267: in __run_cancel_query_and_validate_state
> and not join_before_close), str_fetch_error
> E AssertionError: Exception in fetch_results: 'NoneType' object has no
> attribute 'columns'
> E Traceback (most recent call last):
> E File "/data0/jenkins/Impala/tests/util/cancel_util.py", line 137, in run
> E result = self.client.fetch(self.query, self.handle)
> E File "/data0/jenkins/Impala/tests/common/impala_connection.py", line
> 1099, in fetch
> E return self.__get_operation(operation_handle).fetch(max_rows=max_rows)
> E File
> "/data/jenkins/Impala/infra/python/env-gcc10.4.0/lib/python2.7/site-packages/impala/hiveserver2.py",
> line 1509, in fetch
> E convert_strings_to_unicode=convert_strings_to_unicode)
> E File
> "/data/jenkins/Impala/infra/python/env-gcc10.4.0/lib/python2.7/site-packages/impala/hiveserver2.py",
> line 1516, in _wrap_results
> E convert_strings_to_unicode=convert_strings_to_unicode)
> E File
> "/data/jenkins/Impala/infra/python/env-gcc10.4.0/lib/python2.7/site-packages/impala/hiveserver2.py",
> line 1042, in __init__
> E for (i, col) in enumerate(trowset.columns)]
> E AttributeError: 'NoneType' object has no attribute 'columns'{noformat}
> This is happening when a query is killed via "KILL QUERY":
> {noformat}
> -- 2025-06-14 20:52:49,244 INFO MainThread: hs2: executing against Impala
> at localhost:21050. session: e64409199b769778:6c996b47da987cbe main_cursor:
> True user: None
> KILL QUERY 'ed49f1eef22bed38:c5eae66b00000000';
> -- 2025-06-14 20:52:59,146 INFO FetchingThread: minimal_hs2: Stop
> fetching results
> -- 2025-06-14 20:52:59,921 INFO MainThread:
> c740fffdd7a5009e:1baef1fc00000000: query started
> -- 2025-06-14 20:52:59,922 INFO MainThread:
> c740fffdd7a5009e:1baef1fc00000000: getting log for operation
> -- 2025-06-14 20:52:59,923 INFO MainThread:
> c740fffdd7a5009e:1baef1fc00000000: getting runtime profile operation
> -- 2025-06-14 20:52:59,923 INFO MainThread:
> c740fffdd7a5009e:1baef1fc00000000: closing query for operation
> -- 2025-06-14 20:52:59,924 INFO MainThread: hs2: closing 1 sync and 0
> async hs2 connections to: localhost:21050
> -- 2025-06-14 20:52:59,925 INFO MainThread: minimal_hs2: closing
> connection to: localhost:21050{noformat}
> This could happen on other tests in test_cancellation.py.
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