[GitHub] [hadoop] yuanboliu commented on pull request #4230: HDFS-16558 Consider changing the lock of delegation token from write …

[GitBox]

yuanboliu commented on PR #4230:
URL: https://github.com/apache/hadoop/pull/4230#issuecomment-1111680424

   @Hexiaoqiao Thanks for your comments.
   We will apply this patch to our test env, and give feedback here.
   
   This is the code from trunk to prove that read lock is good enough:
   <img width="762" alt="image" 
src="https://user-images.githubusercontent.com/5643344/165666072-023f7b39-3499-405e-bfd5-1ff1412ab9e1.png";>
   
   
   edit sync is protected by synchronized (this), and renew/cancel/get are 
in-order requests, there is no way that all the requests for one uniq token 
will be handled at the same time.
   


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