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https://issues.apache.org/jira/browse/HDFS-9732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15126776#comment-15126776
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Chris Nauroth commented on HDFS-9732:
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The {{hdfs fetchdt}} command depends on the current output format of
{{DelegationTokenIdentifier#toString}}. Unfortunately, that means the simple
way to make this change also would be backwards-incompatible.
We'll either need to target the change to 3.x, or look at breaking the
dependency of {{hdfs fetchdt}} so that it maintains its current output, but
{{toString}} can still add more detail for things like logging.
HDFS-9085 is a patch that changed this code recently. The decision on that one
was to go to trunk only.
> Remove DelegationTokenIdentifier.toString() —for better logging output
> ----------------------------------------------------------------------
>
> Key: HDFS-9732
> URL: https://issues.apache.org/jira/browse/HDFS-9732
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.7.2
> Reporter: Steve Loughran
> Attachments: HADOOP-12752-001.patch
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> HDFS {{DelegationTokenIdentifier.toString()}} adds some diagnostics info,
> owner, sequence number. But its superclass,
> {{AbstractDelegationTokenIdentifier}} contains a lot more information,
> including token issue and expiry times.
> Because {{DelegationTokenIdentifier.toString()}} doesn't include this data,
> information that is potentially useful for kerberos diagnostics is lost.
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