Bikramjeet Vig created IMPALA-10783:
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Summary: run_and_verify_query_cancellation_test flakiness and
improper error handling in TestImpalaShell
Key: IMPALA-10783
URL: https://issues.apache.org/jira/browse/IMPALA-10783
Project: IMPALA
Issue Type: Bug
Affects Versions: Impala 4.0
Reporter: Bikramjeet Vig
Assignee: Bikramjeet Vig
Some tests in TestImpalaShell run impala-shell in a seperate process but don't
handle the case where the test can fail and the impala-shell process can linger
on.
One such test run_and_verify_query_cancellation_test, failed due to flakiness
and since it ran a query that returned a large result, the impala-shell process
lingered on while fetching results. This caused the query to hold on to
resources and starve the cluster of memory which caused other tests to fail due
to not enough memory being available.
The flakiness in run_and_verify_query_cancellation_test was:
{noformat}
/data/jenkins/workspace/impala-asf-master-core-asan/repos/Impala/tests/shell/test_shell_commandline.py:414:
in test_query_cancellation_during_wait_to_finish
self.run_and_verify_query_cancellation_test(vector, stmt, "RUNNING")
/data/jenkins/workspace/impala-asf-master-core-asan/repos/Impala/tests/shell/test_shell_commandline.py:422:
in run_and_verify_query_cancellation_test
wait_for_query_state(vector, stmt, cancel_at_state)
/data/jenkins/workspace/impala-asf-master-core-asan/repos/Impala/tests/shell/util.py:330:
in wait_for_query_state
raise Exception(exc_text)
E Exception: The found in flight query is not the one under test: set all
{noformat}
the test checked for running queries too fast while the impala-shell was
starting up. the impala-shell runs "set all" when it starts which the test
picked up and raised an error thinking it did find its query.
The result of this lingering query caused other tests to fail and throw errors
like:
{noformat}
query_test/test_tpcds_queries.py:107: in test_tpcds_q18a
self.run_test_case(self.get_workload() + '-q18a', vector)
common/impala_test_suite.py:678: in run_test_case
result = exec_fn(query, user=test_section.get('USER', '').strip() or None)
common/impala_test_suite.py:616: in __exec_in_impala
result = self.__execute_query(target_impalad_client, query, user=user)
common/impala_test_suite.py:936: in __execute_query
return impalad_client.execute(query, user=user)
common/impala_connection.py:205: in execute
return self.__beeswax_client.execute(sql_stmt, user=user)
beeswax/impala_beeswax.py:189: in execute
handle = self.__execute_query(query_string.strip(), user=user)
beeswax/impala_beeswax.py:367: in __execute_query
self.wait_for_finished(handle)
beeswax/impala_beeswax.py:388: in wait_for_finished
raise ImpalaBeeswaxException("Query aborted:" + error_log, None)
E ImpalaBeeswaxException: ImpalaBeeswaxException:
E Query aborted:Failed to get minimum memory reservation of 452.19 MB on
daemon impala-ec2-centos74-m5-4xlarge-ondemand-191d.vpc.cloudera.com:27002 for
query 394b7f96d554f99c:6882496c00000000 due to following error: Failed to
increase reservation by 452.19 MB because it would exceed the applicable
reservation limit for the "Process" ReservationTracker: reservation_limit=10.20
GB reservation=9.91 GB used_reservation=0 child_reservations=9.91 GB
E The top 5 queries that allocated memory under this tracker are:
E Query(fa4ece9474a3f865:1b284e6700000000): Reservation=9.60 GB
ReservationLimit=9.60 GB OtherMemory=118.01 MB Total=9.71 GB Peak=9.71 GB
E Query(534d07950247ae68:6f5a410d00000000): Reservation=123.50 MB
ReservationLimit=9.60 GB OtherMemory=2.68 MB Total=126.18 MB Peak=317.02 MB
E Query(2e4f087aa8263e23:e697d8e800000000): Reservation=50.81 MB
ReservationLimit=9.60 GB OtherMemory=42.62 MB Total=93.43 MB Peak=173.74 MB
E Query(6e459d892dfa5050:5959219b00000000): Reservation=28.88 MB
ReservationLimit=9.60 GB OtherMemory=18.77 MB Total=47.64 MB Peak=53.11 MB
E Query(ad455bea2e0adc64:2b0bbf3500000000): Reservation=17.94 MB
ReservationLimit=9.60 GB OtherMemory=15.22 MB Total=33.16 MB Peak=163.99 MB
E
E
E
E
E
E Memory is likely oversubscribed. Reducing query concurrency or configuring
admission control may help avoid this error.
{noformat}
Logs confirmed that fa4ece9474a3f865:1b284e6700000000 is the query id of the
query that run_and_verify_query_cancellation_test ran.
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