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Posted to issues@spark.apache.org by "Hieu Tri Huynh (JIRA)" <ji...@apache.org> on 2018/08/01 22:14:00 UTC

[jira] [Created] (SPARK-24992) spark should randomize yarn local dir selection

Hieu Tri Huynh created SPARK-24992:
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             Summary: spark should randomize yarn local dir selection
                 Key: SPARK-24992
                 URL: https://issues.apache.org/jira/browse/SPARK-24992
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.3.1
            Reporter: Hieu Tri Huynh


Utils.getLocalDir is used to get path of a temporary directory. However, it always returns the the same directory, which is the first element in the array _localRootDirs_. When running on YARN, this might causes the case that we always write to one disk, which makes it busy while other disks are free. We should randomize the selection to spread out the loads. 



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