[jira] [Resolved] (SPARK-20560) Review Spark's handling of filesystems returning "localhost" in getFileBlockLocations

["Steve Loughran (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-20560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran resolved SPARK-20560.
------------------------------------
    Resolution: Invalid

"localhost" is filtered, been done in {{HadoopRDD.getPreferredLocations()}} since commit #06aac8a.



> Review Spark's handling of filesystems returning "localhost" in getFileBlockLocations
> -------------------------------------------------------------------------------------
>
>                 Key: SPARK-20560
>                 URL: https://issues.apache.org/jira/browse/SPARK-20560
>             Project: Spark
>          Issue Type: Bug
>          Components: Scheduler
>    Affects Versions: 2.1.0
>            Reporter: Steve Loughran
>            Priority: Minor
>
> Some filesystems (S3a, Azure WASB) return "localhost" as the response to {{FileSystem.getFileBlockLocations(path)}}. If this is then used as the preferred host when scheduling work, there's a risk that work will be queued on one host, rather than spread across the cluster.
> HIVE-14060 and TEZ-3291 have both seen it in their schedulers.
> I don't know if Spark does it, someone needs to look at the code, maybe write some tests



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