[jira] [Commented] (SPARK-7439) Should delete temporary local directories

["Sumit Nigam (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-7439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14643916#comment-14643916 ] 

Sumit Nigam commented on SPARK-7439:
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For spark on YARN, would YARN not remove all local directories created by spark workers upon their exit, even if it was unclean exit? Including this one?

> Should delete temporary local directories
> -----------------------------------------
>
>                 Key: SPARK-7439
>                 URL: https://issues.apache.org/jira/browse/SPARK-7439
>             Project: Spark
>          Issue Type: Bug
>          Components: Block Manager
>    Affects Versions: 1.3.1
>         Environment: Windows 7, CentOS 6.6
>            Reporter: Taeyun Kim
>            Priority: Minor
>
> Spark does not delete temporary local directories.
> After a spark program completes, there are 3 temporary directories remain in the temp directory. The directory names are like this: spark-2e389487-40cc-4a82-a5c7-353c0feefbb7
> The directories are empty.
> They are created every time the Spark program runs. So the number of files and directories keeps growing.
> I've traced the spark source code.
> The module methods that create the 3 'temp' directories are as follows:
> * DiskBlockManager.createLocalDirs
> * HttpFileServer.initialize
> * SparkEnv.sparkFilesDir
> They (eventually) call Utils.getOrCreateLocalRootDirs and then Utils.createDirectory, which intentionally does NOT mark the directory for automatic deletion.
> The comment of createDirectory method says: "The directory is guaranteed to be newly created, and is not marked for automatic deletion."
> But since the directories does not hold useful data after the program completes, they should be deleted if possible.



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