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From "Chao (JIRA)" <>
Subject [jira] [Commented] (HIVE-7492) Enhance SparkCollector
Date Thu, 07 Aug 2014 20:59:12 GMT


Chao commented on HIVE-7492:

Hi [~vkorukanti] and [~brocknoland], after applying the patch, running following simple query:

select key, sum(value) from src group by key

produces no result. However, it works before this patch.
Can you take a look? Thanks!

> 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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