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https://issues.apache.org/jira/browse/PIG-2812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13412421#comment-13412421
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Haitao Yao commented on PIG-2812:
---------------------------------
Shall we change the Parent class : org.apache.pig.data.DefaultAbstractBag or
just modify the InternalCachedBag ?
I don't know why DefaultAbstractBag writes a tmp file for every tuple.
In our own code base, I just modified the InternalCachedBag, because I don't
want know the how the subclasses of DefaultAbstractBag gonna behave if I modify
the whole spill logic .
I want to contribute to this.
thanks.
> Spill InternalCachedBag into only 1 file
> ----------------------------------------
>
> Key: PIG-2812
> URL: https://issues.apache.org/jira/browse/PIG-2812
> Project: Pig
> Issue Type: Bug
> Components: data
> Reporter: Haitao Yao
> Fix For: 0.11
>
> Attachments: aa.jpg
>
>
> I encountered a reducer's OOM because of java.io.DeleteOnExitHook. And I
> found out that the InternalCachedBag creates a seperate tmp file, and the tmp
> files is deleted on exit. So the file delete hook caused the OOM.
> Why not just hold the tmp file handle and spill only one tmp file?
> Too many tmp files may block the tasktracker start process, if the tmp files
> are not cleaned on time and the tasktracker restarts at this specific time.
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