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https://issues.apache.org/jira/browse/HADOOP-12774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15210331#comment-15210331
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Steve Loughran commented on HADOOP-12774:
-----------------------------------------
probably
> s3a should use UGI.getCurrentUser.getShortname() for username
> -------------------------------------------------------------
>
> Key: HADOOP-12774
> URL: https://issues.apache.org/jira/browse/HADOOP-12774
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.7.2
> Reporter: Steve Loughran
> Assignee: John Zhuge
>
> S3a users {{System.getProperty("user.name")}} to get the username for the
> homedir. This is wrong, as it doesn't work on a YARN app where the identity
> is set by HADOOP_USER_NAME, or in a doAs clause.
> Obviously, {{UGI.getCurrentUser.getShortname()}} provides that name,
> everywhere.
> This is a simple change in the source, though testing is harder ... probably
> best to try in a doAs
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