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https://issues.apache.org/jira/browse/HIVE-15683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15858149#comment-15858149
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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/12851638/HIVE-15683.2.patch
{color:green}SUCCESS:{color} +1 due to 1 test(s) being added or modified.
{color:red}ERROR:{color} -1 due to 4 failed/errored test(s), 10241 tests
executed
*Failed tests:*
{noformat}
TestDerbyConnector - did not produce a TEST-*.xml file (likely timed out)
(batchId=235)
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.TestPerfCliDriver.testCliDriver[query23]
(batchId=223)
{noformat}
Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/3441/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/3441/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-3441/
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: 4 tests failed
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12851638 - 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-15683.2.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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