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From "Sean Owen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-7439) Should delete temporary local directories
Date Sun, 10 May 2015 20:29:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-7439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14537350#comment-14537350
] 

Sean Owen commented on SPARK-7439:
----------------------------------

I expect these won't be removed if the JVM fails abruptly, but it does not depend on {{close()}}
as it's a shutdown hook. Or, it shouldn't. I don't think it's worth the complexity to go find
and delete old dirs later, as they're just directories, and it should only come up in a hard
failure case.

So I'm not sure what to do about this one, as the dirs are already scheduled for deletion
on shutdown.

> 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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