[
https://issues.apache.org/jira/browse/HIVE-7121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14015864#comment-14015864
]
Gopal V commented on HIVE-7121:
-------------------------------
This has an additional test failure which was not present in HIVE-7158 runs
(which includes this patch).
{code}
org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver_dynpart_sort_optimization
org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver_insert1
{code}
are not failing in
https://issues.apache.org/jira/browse/HIVE-7158?focusedCommentId=14015118&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14015118
flaky tests?
> Use murmur hash to distribute HiveKey
> -------------------------------------
>
> Key: HIVE-7121
> URL: https://issues.apache.org/jira/browse/HIVE-7121
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Gopal V
> Assignee: Gopal V
> Attachments: HIVE-7121.1.patch, HIVE-7121.2.patch, HIVE-7121.3.patch,
> HIVE-7121.WIP.patch
>
>
> The current hashCode implementation produces poor parallelism when dealing
> with single integers or doubles.
> And for partitioned inserts into a 1 bucket table, there is a significant
> hotspot on Reducer #31.
> Removing the magic number 31 and using a more normal hash algorithm would
> help fix these hotspots.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
