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From "Marcelo Vanzin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-22519) ApplicationMaster.cleanupStagingDir() throws NPE when SPARK_YARN_STAGING_DIR env var is not available
Date Tue, 14 Nov 2017 18:47:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-22519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16251929#comment-16251929
] 

Marcelo Vanzin commented on SPARK-22519:
----------------------------------------

Yeah, that check seems bogus, but {{SPARK_YARN_STAGING_DIR}} should never really be unset.

> ApplicationMaster.cleanupStagingDir() throws NPE when SPARK_YARN_STAGING_DIR env var
is not available
> -----------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-22519
>                 URL: https://issues.apache.org/jira/browse/SPARK-22519
>             Project: Spark
>          Issue Type: Improvement
>          Components: YARN
>    Affects Versions: 2.2.0
>            Reporter: Devaraj K
>            Priority: Minor
>
> In the below, the condition checks whether the stagingDirPath is null but stagingDirPath
never becomes null. If SPARK_YARN_STAGING_DIR env var is null then it throws NPE while creating
the Path.
> {code:title=ApplicationMaster.scala|borderStyle=solid}
>         stagingDirPath = new Path(System.getenv("SPARK_YARN_STAGING_DIR"))
>         if (stagingDirPath == null) {
>           logError("Staging directory is null")
>           return
>         }
> {code}
> Here we need to check whether the System.getenv("SPARK_YARN_STAGING_DIR") is null or
not, not the stagingDirPath.



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