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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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pralabhkumar updated SPARK-39755:
---------------------------------
Description:
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}
conf.getenv("SPARK_LOCAL_DIRS").split(",") is not randomizedInplace. 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.
> Spark-shuffle locations are not randomized in K8s
> --------------------------------------------------
>
> Key: SPARK-39755
> URL: https://issues.apache.org/jira/browse/SPARK-39755
> Project: Spark
> Issue Type: Bug
> Components: Kubernetes, Spark Core
> Affects Versions: 3.3.0
> Reporter: pralabhkumar
> Priority: Minor
>
> 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}
> conf.getenv("SPARK_LOCAL_DIRS").split(",") is not randomizedInplace. 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.
>
>
>
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