stczwd commented on issue #23827: [SPARK-26912][CORE][HISTORY] Allow setting 
permission for event_log
URL: https://github.com/apache/spark/pull/23827#issuecomment-465090001
 
 
   > why would we have some problems with permission? we can just make the 
historyServer's ugi in the group to solve the access problem for evenLogs owned 
by different users. And HDFS extended acl can solve the permission managenent 
problem.
   
   Then, how would you deal with the first and second scenarios?
   1, the user has some ugis that can not be added to the same group
   2, the user, who created applications, does not allow others to see or 
modifie it, event they are in same group

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