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https://issues.apache.org/jira/browse/HADOOP-12563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15277361#comment-15277361
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Li Lu commented on HADOOP-12563:
--------------------------------
bq. that looks like an bona fide IO error to me...
Sorry I'm confused, could you please elaborate more on this?
The exception was generated from readTokenStorageStream, where we check the
version number of the token storage. I'm not sure why 1 is an unknown version
in the version check...
> 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
> Fix For: 3.0.0
>
> 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, HADOOP-12563.07.patch, HADOOP-12563.07.patch,
> HADOOP-12563.08.patch, HADOOP-12563.09.patch, HADOOP-12563.10.patch,
> HADOOP-12563.11.patch, HADOOP-12563.12.patch, HADOOP-12563.13.patch,
> HADOOP-12563.14.patch, HADOOP-12563.15.patch, HADOOP-12563.16.patch,
> dtutil-test-out, 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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