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https://issues.apache.org/jira/browse/SPARK-39755?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-39755:
----------------------------------
Affects Version/s: 3.4.0
(was: 3.3.0)
> Improve LocalDirsFeatureStep to randomize local directories
> -----------------------------------------------------------
>
> Key: SPARK-39755
> URL: https://issues.apache.org/jira/browse/SPARK-39755
> Project: Spark
> Issue Type: Improvement
> Components: Kubernetes
> Affects Versions: 3.4.0
> Reporter: pralabhkumar
> Assignee: pralabhkumar
> Priority: Minor
> Fix For: 3.4.0
>
>
> In org.apache.spark.util getConfiguredLocalDirs
>
> {code:java}
> if (isRunningInYarnContainer(conf)) {
> // If we are in yarn mode, systems can have different disk layouts so we
> must set it
> // to what Yarn on this system said was available. Note this assumes that
> Yarn has
> // created the directories already, and that they are secured so that only
> the
> // user has access to them.
> randomizeInPlace(getYarnLocalDirs(conf).split(","))
> } else if (conf.getenv("SPARK_EXECUTOR_DIRS") != null) {
> conf.getenv("SPARK_EXECUTOR_DIRS").split(File.pathSeparator)
> } else if (conf.getenv("SPARK_LOCAL_DIRS") != null) {
> conf.getenv("SPARK_LOCAL_DIRS").split(",")
> }{code}
> randomizedInplace is not called conf.getenv("SPARK_LOCAL_DIRS").split(",") .
> This is what used in case of K8s and the shuffle locations are not
> randomized.
> IMHO , this should be randomized , so that all the directories have equal
> changes of pushing the data as was done on yarn side
>
>
>
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