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Posted to issues@spark.apache.org by "Xuefu Zhang (JIRA)" <ji...@apache.org> on 2014/12/22 19:36:14 UTC
[jira] [Commented] (SPARK-4921) Performance issue caused by
TaskSetManager returning PROCESS_LOCAL for NO_PREF tasks
[ https://issues.apache.org/jira/browse/SPARK-4921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14256015#comment-14256015 ]
Xuefu Zhang commented on SPARK-4921:
------------------------------------
cc: [~lirui], [~sandyr]
> Performance issue caused by TaskSetManager returning PROCESS_LOCAL for NO_PREF tasks
> -------------------------------------------------------------------------------------
>
> Key: SPARK-4921
> URL: https://issues.apache.org/jira/browse/SPARK-4921
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.2.0
> Reporter: Xuefu Zhang
>
> During research for HIVE-9153, we found that TaskSetManager returns PROCESS_LOCAL for NO_PREF tasks, which may caused performance degradation. Changing the return value to NO_PREF, as demonstrated in the attached patch, seemingly improves the performance.
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