sunhelly commented on pull request #3146:
URL: https://github.com/apache/hbase/pull/3146#issuecomment-818485994


   Hi, @Apache9 .Thanks your questions.
   >Mind explaing a bit about the change? Why we need to increase the waiting 
time?
   I think the global permission grant operation is a very slow operation. 
Because it needs about more than six times of RPCs to get/put data with the ACL 
table, not only need to change table&ns acls, but also HDFS acls, and there 
seems no cache about the ACL permissions?
   


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