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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-13780) Postpone NameNode state discovery in ObserverReadProxyProvider until the first real RPC call.
Date Wed, 01 Aug 2018 23:19:00 GMT
Konstantin Shvachko created HDFS-13780:
------------------------------------------

             Summary: 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


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. 



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