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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2022/02/03 02:48:00 UTC

[GitHub] [hadoop] jojochuang commented on pull request #3907: HDFS-16432. Namenode block report add yield to avoid holding write lo…

jojochuang commented on pull request #3907:
URL: https://github.com/apache/hadoop/pull/3907#issuecomment-1028551793


   Thanks for opening a PR.
   However, I am not so sure if this is the right approach. The whole design namenode assumes a global namespace lock and within it, data structure access is consistent. Once you yield in the middle, there's no such guarantee and it could run into data races.
   
   As for the block report taking time -- is it still a problem after removing the folded tree set structure (HDFS-13671)?


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