[jira] [Updated] (MAPREDUCE-4458) Warn if java.library.path is used for AM or Task

["Robert Joseph Evans (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4458?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Joseph Evans updated MAPREDUCE-4458:
-------------------------------------------

    Summary: Warn if java.library.path is used for AM or Task  (was: Warn in java.library.path is used)
    
> Warn if java.library.path is used for AM or Task
> ------------------------------------------------
>
>                 Key: MAPREDUCE-4458
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4458
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2
>    Affects Versions: 0.23.3, 3.0.0, 2.2.0-alpha
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Joseph Evans
>
> If java.library.path is used on the command line for launching an MRAppMaster or an MR Task, it could conflict with how standard Hadoop/HDFS JNI libraries and dependencies are found.  At a minimum the client should output a warning and ask the user to switch to LD_LIBRARY_PATH.  It would be nice to automatically do this for them but parsing the command line is scary so just a warning is probably good enough for now.

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