aajisaka commented on pull request #3675:
URL: https://github.com/apache/hadoop/pull/3675#issuecomment-987488754


   Thank you @KevinWikant @sodonnel @virajjasani for your discussion, and 
thanks @KevinWikant again for the deep dive.
   
   I'm in favor of the approach in this PR.
   
   > This violates the expectation the the unit test is enforcing which is that 
a dead DECOMMISSION_INPROGRESS node should transition to DECOMMISSIONED when 
there are no LowRedundancy blocks
   
   The expectation is added by HDFS-7374. This JIRA allowed decommissioning of 
dead DataNodes, and the feature has been enabled for a long time since Hadoop 
2.7.0. I don't want to break the expectation because breaking it surprises the 
administrators.


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