[jira] [Updated] (HADOOP-19401) Improve error message when OS can't identify the current user.

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-19401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HADOOP-19401:
------------------------------------
    Labels: pull-request-available  (was: )

> Improve error message when OS can't identify the current user.
> --------------------------------------------------------------
>
>                 Key: HADOOP-19401
>                 URL: https://issues.apache.org/jira/browse/HADOOP-19401
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 3.3.4, 3.3.6, 3.4.1
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>            Priority: Major
>              Labels: pull-request-available
>
> Under simple auth, UGI identifies the current Hadoop user as the OS user. If the OS can't determine the user, then they receive a cryptic {{KerberosAuthException}}, even though Kerberos auth isn't really configured. I've seen this come up for Hadoop processes launched in Docker containers that accidentally specify a UID that's not actually present in the image. We can improve this error so that users have a better understanding of how to fix the problem.



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