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https://issues.apache.org/jira/browse/MAPREDUCE-7154?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved MAPREDUCE-7154.
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Resolution: Won't Fix
> TokenCache.obtainTokensForNamenodes() to get DTs even when security is off
> --------------------------------------------------------------------------
>
> Key: MAPREDUCE-7154
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7154
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: client
> Affects Versions: 3.2.0
> Reporter: Steve Loughran
> Priority: Minor
>
> Currently {{TokenCache.obtainTokensForNamenodes()}} returns immediately if
> security disabled. This works when DTs are only built from Kerberos creds,
> but means that filesystems which serve up credentials which don't need
> kerberos (HADOOP-14556 for S3A, ABFS and WASB can also be enhanced to do
> this), don't get picked up
> The token cache can just ask each FS for any tokens, relying on them to
> return null if they aren't generating/forwarding any
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