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Date: Thu, 7 Aug 2014 21:23:12 +0000 (UTC)
From: "Venki Korukanti (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <JIRA.12729293.1406155843290.37989.1407446592306@arcas>
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Subject: [jira] [Commented] (HIVE-7492) Enhance SparkCollector
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    [ https://issues.apache.org/jira/browse/HIVE-7492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14089871#comment-14089871 ] 

Venki Korukanti commented on HIVE-7492:
---------------------------------------

GroupBy operator is adding output records to Output Collector after closing the ExecMapper/ExecReducer. Need to check if {{lastRecordOutput}} has any records after closing the ExecMapper/ExecReducer. I will log a JIRA and attach the patch.

> Enhance SparkCollector
> ----------------------
>
>                 Key: HIVE-7492
>                 URL: https://issues.apache.org/jira/browse/HIVE-7492
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>            Reporter: Xuefu Zhang
>            Assignee: Venki Korukanti
>             Fix For: spark-branch
>
>         Attachments: HIVE-7492-1-spark.patch, HIVE-7492.2-spark.patch
>
>
> SparkCollector is used to collect the rows generated by HiveMapFunction or HiveReduceFunction. It currently is backed by a ArrayList, and thus has unbounded memory usage. Ideally, the collector should have a bounded memory usage, and be able to spill to disc when its quota is reached.


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