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https://issues.apache.org/jira/browse/HDFS-9732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15213041#comment-15213041
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Steve Loughran commented on HDFS-9732:
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The thing about those logfiles is they are the ones making more use of it, they
are the ones where you only look at them when things have gone wrong and you
want as much detail as you want. There's also the tradition of expanding
toString diagnostics in subclasses; here subclasses would need to know to not
call {{super.toString()}} and instead call some other method
Update that and alongside it add a public @stable method {{, say
detailsForCLI()}} javadoced as "do not change this output". A unique name and
text will keep anyone from adding it to it later.
I absolutely do not want to break CLI output here —and I'm glad you picked up
on it— all we need to do know is work out the way to both improve log
diagnostics and ensure that nobody else tries to improve the output later
> 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
> Assignee: Yongjun Zhang
> Attachments: HADOOP-12752-001.patch, HDFS-9732.001.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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