[GitHub] [hadoop] Hexiaoqiao commented on pull request #5398: HDFS-16922. The logic of IncrementalBlockReportManager#addRDBI method may cause missing blocks when cluster is busy.

["Hexiaoqiao (via GitHub)" <gi...@apache.org>]

Hexiaoqiao commented on PR #5398:
URL: https://github.com/apache/hadoop/pull/5398#issuecomment-1432498891

   Thanks to involve me here. It is interesting issue. I am confused about some points of the description.
   
   > dn3 is writting the blk_12345_002 , but dn2 is blocked by recoverClose method and does not send ack to client.
   
   is this another injects or related this write flow?
   
   > dn3 writes blk_12345_003 successfully.
   > dn3 writes blk_12345_002 successfully and notifyNamenodeReceivedBlock.
   
   Here dn3 writes the same block replica twice, is it expected?
   
   Sorry didn't dig deeply this logic, will trace it for a while.
   @hfutatzhanghb Thanks again for your report and offer the solution. 


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