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