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https://issues.apache.org/jira/browse/HDFS-13951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16635938#comment-16635938
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Steve Loughran commented on HDFS-13951:
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I'm using it there as part of the test run: without it things don't print. I
can create DTs for s3a, just not print them. I also want to open up the command
a bit for better testability (let me pass in a conf file to a main() entry
point, so a correctly configured store). As it is
bq. Also, there should be no need to conditionalize on hdfs.
it's needed for the conditional use of toStableString().
> HDFS DelegationTokenFetcher can't print non-HDFS tokens in a tokenfile
> ----------------------------------------------------------------------
>
> Key: HDFS-13951
> URL: https://issues.apache.org/jira/browse/HDFS-13951
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: tools
> Affects Versions: 3.2.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
>
> the fetchdt command can fetch tokens for filesystems other than hdfs (s3a,
> abfs, etc), but it can't print them, as it assumes all tokens in the file are
> subclasses of
> {{org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier}}
> & uses this fact in its decoding. It deserializes the token byte array
> without checking kind and so ends up with invalid data.
> Fix: ask the tokens to decode themselves; only call toStableString() if an
> HDFS token.
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