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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14060) HDFS fetchdt command to return error codes on success/failure
Date Mon, 12 Nov 2018 10:55:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16683562#comment-16683562

Steve Loughran commented on HDFS-14060:


Looking at Daryn's comments there, we could think about having something better in the "hadoop"
command and do it based on our experiences of this one.

* take list of FS URLs, collect DT for each
* support appending to existing token file (or make the ability to merge TFs a separate option.

* if you add the -print option, print out the issued tokens, not the existing contents of
the output file (today's behaviour)

FWIW, one nice thing about fetchdt is that it doesn't require Kerberos to be enabled: good
for testing

> HDFS fetchdt command to return error codes on success/failure
> -------------------------------------------------------------
>                 Key: HDFS-14060
>                 URL: https://issues.apache.org/jira/browse/HDFS-14060
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: tools
>    Affects Versions: 3.3.0
>            Reporter: Steve Loughran
>            Assignee: Kitti Nanasi
>            Priority: Major
> The {{hdfs fetchdt}} command always returns 0, even when there's been an error (no token
issued, no file to load, usage, etc). This means its not that useful as a command line tool
for testing or in scripts.
> Proposed: exit non-zero for errors; reuse LaucherExitCodes for these

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