[jira] [Updated] (PIG-2812) Spill InternalCachedBag into only 1 file

["Haitao Yao (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-2812?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Haitao Yao updated PIG-2812:
----------------------------

    Attachment: spill.patch

patch for spill
spill into only 1 directory and use shutdownhook to delete the dir

                
> 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, spill.patch
>
>
> 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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