gaborgsomogyi commented on issue #24235: [SPARK-27301][Dstream]Shorten the 
FileSystem cached life cycle to the cleanup method inner scope
URL: https://github.com/apache/spark/pull/24235#issuecomment-477709964
 
 
   > I think this change is fine
   
   Delegation tokens are obtained for 24 hours and renewed after 24h * 0.75 per 
default for safety reasons. So asking again just like before: Without 
SecurityManager obtaining a new token how does a new instance solve this issue?
   

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