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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2022/09/29 05:08:33 UTC

[GitHub] [hadoop] Hexiaoqiao commented on pull request #4945: HDFS-16785. DataNode hold BP write lock to scan disk

Hexiaoqiao commented on PR #4945:
URL: https://github.com/apache/hadoop/pull/4945#issuecomment-1261758130

   > 1、When fsVolume.getVolumeMap() scan the bock from disk to add block metadata，it may add new block metadata when another thread add block.
   
   Great point. +1 from my side. So volume level lock will be more proper?
   
   > 2、How we deal conflict when remove BlockPool operating occur at same time.
   
   Not sure if this is block issue. This improvement seems not involve global meta management, only prepare phase here? So any conflict here?


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