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https://issues.apache.org/jira/browse/HIVE-15683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15857952#comment-15857952
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Hive QA commented on HIVE-15683:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12851611/HIVE-15683.1.patch
{color:red}ERROR:{color} -1 due to no test(s) being added or modified.
{color:red}ERROR:{color} -1 due to 6 failed/errored test(s), 10226 tests
executed
*Failed tests:*
{noformat}
TestDerbyConnector - did not produce a TEST-*.xml file (likely timed out)
(batchId=235)
TestSparkCliDriver - did not produce a TEST-*.xml file (likely timed out)
(batchId=121)
[stats12.q,groupby4.q,union_top_level.q,stats2.q,groupby10.q,mapjoin_filter_on_outerjoin.q,auto_sortmerge_join_4.q,limit_partition_metadataonly.q,load_dyn_part4.q,union3.q,groupby_multi_single_reducer.q,smb_mapjoin_14.q,groupby3_noskew_multi_distinct.q,stats18.q,union_remove_21.q]
org.apache.hadoop.hive.cli.TestEncryptedHDFSCliDriver.testCliDriver[encryption_join_with_different_encryption_keys]
(batchId=159)
org.apache.hadoop.hive.cli.TestPerfCliDriver.testCliDriver[query14]
(batchId=223)
org.apache.hadoop.hive.cli.TestSparkCliDriver.testCliDriver[lateral_view_explode2]
(batchId=131)
org.apache.hadoop.hive.cli.TestSparkCliDriver.testCliDriver[union_remove_25]
(batchId=133)
{noformat}
Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/3438/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/3438/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-3438/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 6 tests failed
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12851611 - PreCommit-HIVE-Build
> Make what's done in HIVE-15580 for group by configurable
> --------------------------------------------------------
>
> Key: HIVE-15683
> URL: https://issues.apache.org/jira/browse/HIVE-15683
> Project: Hive
> Issue Type: Improvement
> Components: Spark
> Affects Versions: 2.2.0
> Reporter: Xuefu Zhang
> Assignee: Xuefu Zhang
> Attachments: HIVE-15683.1.patch, HIVE-15683.patch
>
>
> HIVE-15580 changed the way the data is shuffled for group by: instead of
> using Spark's groupByKey to shuffle data, Hive on Spark now uses
> repartitionAndSortWithinPartitions(), which generates (key, value) pairs
> instead of original (key, value iterator). This might have some performance
> implications, but it's needed to get rid of unbound memory usage by
> {{groupByKey}}.
> Here we'd like to compare group by performance with or w/o HIVE-15580. If the
> impact is significant, we can provide a configuration that allows user to
> switch back to the original way of shuffling.
> This work should be ideally done after HIVE-15682 as the optimization there
> should help the performance here as well.
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