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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12563) Updated utility to create/modify token files
Date Fri, 05 Feb 2016 16:23:39 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15134404#comment-15134404
] 

Steve Loughran commented on HADOOP-12563:
-----------------------------------------

SPARK-11265 and SPARK-12241 show the how apps will benefit from a standard API for loading
tokens; each service needs its own custom reflection code, something which was inadvertently
broken when upgrading the hive version. To add support for new services (e.g Accumulo), Spark
would currently need to patch its Client.scala class. That's not sustainable.

> Updated utility to create/modify token files
> --------------------------------------------
>
>                 Key: HADOOP-12563
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12563
>             Project: Hadoop Common
>          Issue Type: New Feature
>    Affects Versions: 3.0.0
>            Reporter: Allen Wittenauer
>            Assignee: Matthew Paduano
>         Attachments: HADOOP-12563.01.patch, HADOOP-12563.02.patch, HADOOP-12563.03.patch,
HADOOP-12563.04.patch, HADOOP-12563.05.patch, HADOOP-12563.06.patch, example_dtutil_commands_and_output.txt,
generalized_token_case.pdf
>
>
> hdfs fetchdt is missing some critical features and is geared almost exclusively towards
HDFS operations.  Additionally, the token files that are created use Java serializations which
are hard/impossible to deal with in other languages. It should be replaced with a better utility
in common that can read/write protobuf-based token files, has enough flexibility to be used
with other services, and offers key functionality such as append and rename. The old version
file format should still be supported for backward compatibility, but will be effectively
deprecated.
> A follow-on JIRA will deprecrate fetchdt.



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