[jira] [Created] (IMPALA-7442) test_semi_joins_exhaustive occasionally fails

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

Michael Brown created IMPALA-7442:
-------------------------------------

             Summary: test_semi_joins_exhaustive occasionally fails
                 Key: IMPALA-7442
                 URL: https://issues.apache.org/jira/browse/IMPALA-7442
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 3.1.0
            Reporter: Michael Brown
            Assignee: Tim Armstrong
         Attachments: profile.txt.gz

This test occasionally fails with a very large error message, the top of which is shared below. I will attached a gzip profile of my local reproduction. I've seen this test fail twice on a *release build* of Impala. The reproduction and profile I shared below was also with a release build.

{noformat}
Cannot perform hash join at node with id 4. Repartitioning did not reduce the size of a spilled partition. Repartitioning level 1. Number of rows 60280000:
PartitionedHashJoinNode (id=4 op=2 state=RepartitioningBuild #spilled_partitions=0)
PhjBuilder: Hash partitions: 16:
{noformat}

I was able to reproduce this by doing:
{noformat}
for f in $(seq 100)
do
  impala-py.test -k test_semi_joins_exhaustive tests/query_test/test_join_queries.py --workload_exploration_strategy functional-query:exhaustive -m "not execute_serially" || { echo $f; break; }
done
{noformat}

If you want more noise but a faster reproduction, try:
{noformat}
impala-py.test -k test_semi_joins_exhaustive tests/query_test/test_join_queries.py --workload_exploration_strategy functional-query:exhaustive --collect-only -m "not execute_serially" -n4
{noformat}



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