Steve Loughran created MAPREDUCE-7154:
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Summary: 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
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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