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Posted to hdfs-dev@hadoop.apache.org by "Konstantin Shvachko (JIRA)" <ji...@apache.org> on 2018/08/31 19:55:00 UTC

[jira] [Resolved] (HDFS-13780) Postpone NameNode state discovery in ObserverReadProxyProvider until the first real RPC call.

     [ https://issues.apache.org/jira/browse/HDFS-13780?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin Shvachko resolved HDFS-13780.
----------------------------------------
       Resolution: Duplicate
    Fix Version/s: HDFS-12943

I think it was incorporated, indeed.

> Postpone NameNode state discovery in ObserverReadProxyProvider until the first real RPC call.
> ---------------------------------------------------------------------------------------------
>
>                 Key: HDFS-13780
>                 URL: https://issues.apache.org/jira/browse/HDFS-13780
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>            Reporter: Konstantin Shvachko
>            Assignee: Chen Liang
>            Priority: Major
>             Fix For: HDFS-12943
>
>
> Currently {{ObserverReadProxyProvider}} during instantiation discovers Observers by poking known NameNodes and checking their states. This rather expensive process can be postponed until the first actual RPC call.
> This is an optimization.



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