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From "Venki Korukanti (JIRA)" <>
Subject [jira] [Commented] (HIVE-7492) Enhance SparkCollector
Date Thu, 07 Aug 2014 21:23:12 GMT


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:
>             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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