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https://issues.apache.org/jira/browse/HIVE-18378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16355893#comment-16355893
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Sahil Takiar commented on HIVE-18378:
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[~kellyzly] yes feel free to take this up. I spent some time working on this a
few weeks ago, but hit a few issues. I attached a patch of what I had done so
far. Feel free to use that the basis of this work (or not).
The main issue I was hitting was that the {{CombineEquivalentWorkResolver}} was
being triggered in a lot of different queries. More places than I thought it
should be.
> Explain plan should show if a Map/Reduce Work is being cached
> -------------------------------------------------------------
>
> Key: HIVE-18378
> URL: https://issues.apache.org/jira/browse/HIVE-18378
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Sahil Takiar
> Assignee: liyunzhang
> Priority: Major
> Attachments: HIVE-18378.1.patch
>
>
> It would be nice if the explain plan showed what {{MapWork}} / {{ReduceWork}}
> objects are being cached by Spark.
> The {{CombineEquivalentWorkResolver}} is the only code that triggers Spark
> cache-ing, so we should be able to modify it so that it displays if a work
> object will be cached or not.
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