It seems that they are always empty.
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." I don't know why they are not marked. Is this really intentional? From: Haopu Wang [mailto:hw...@qilinsoft.com] Sent: Friday, May 08, 2015 11:37 AM To: Taeyun Kim; Ted Yu; Todd Nist; user@spark.apache.org Subject: RE: Spark does not delete temporary directories I think the temporary folders are used to store blocks and shuffles. That doesn't depend on the cluster manager. Ideally they should be removed after the application has been terminated. Can you check if there are contents under those folders? _____ From: Taeyun Kim [mailto:taeyun....@innowireless.com] Sent: Friday, May 08, 2015 9:42 AM To: 'Ted Yu'; 'Todd Nist'; user@spark.apache.org Subject: RE: Spark does not delete temporary directories Thanks, but it seems that the option is for Spark standalone mode only. I've (lightly) tested the options with local mode and yarn-client mode, the 'temp' directories were not deleted. From: Ted Yu [mailto:yuzhih...@gmail.com] Sent: Thursday, May 07, 2015 10:47 PM To: Todd Nist Cc: Taeyun Kim; user@spark.apache.org Subject: Re: Spark does not delete temporary directories Default value for spark.worker.cleanup.enabled is false: private val CLEANUP_ENABLED = conf.getBoolean("spark.worker.cleanup.enabled", false) I wonder if the default should be set as true. Cheers On Thu, May 7, 2015 at 6:19 AM, Todd Nist <tsind...@gmail.com> wrote: Have you tried to set the following? spark.worker.cleanup.enabled=true spark.worker.cleanup.appDataTtl=<seconds>" On Thu, May 7, 2015 at 2:39 AM, Taeyun Kim <taeyun....@innowireless.com> wrote: Hi, After a spark program completes, there are 3 temporary directories remain in the temp directory. The file names are like this: spark-2e389487-40cc-4a82-a5c7-353c0feefbb7 And the Spark program runs on Windows, a snappy DLL file also remains in the temp directory. The file name is like this: snappy-1.0.4.1-6e117df4-97b6-4d69-bf9d-71c4a627940c-snappyjava They are created every time the Spark program runs. So the number of files and directories keeps growing. How can let them be deleted? Spark version is 1.3.1 with Hadoop 2.6. Thanks.
