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https://issues.apache.org/jira/browse/HDFS-16569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17533186#comment-17533186
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Yuanbo Liu commented on HDFS-16569:
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Regarding Tectonic, seperating deamon threads from NN and isolating DN from NN
are most attracting features. Maybe we can design and implement those features
on hadoop-4 ?
> Consider attaching block location info from client when closing a completed
> file
> --------------------------------------------------------------------------------
>
> Key: HDFS-16569
> URL: https://issues.apache.org/jira/browse/HDFS-16569
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Yuanbo Liu
> Priority: Major
>
> when a file is finished, client will not close it until DNs send
> RECEIVED_BLOCK by ibr or client is timeout. we can always see such kind of
> log in namenode
> {code:java}
> is COMMITTED but not COMPLETE(numNodes= 0 < minimum = 1) in file{code}
> Since client already has the last block locations, it's not necessary to rely
> on the ibr from DN when closing file.
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