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Posted to hdfs-issues@hadoop.apache.org by "Konstantin Shvachko (JIRA)" <ji...@apache.org> on 2018/08/01 23:08:00 UTC

[jira] [Created] (HDFS-13779) Implement performFailover logic for ObserverReadProxyProvider.

Konstantin Shvachko created HDFS-13779:
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             Summary: Implement performFailover logic for ObserverReadProxyProvider.
                 Key: HDFS-13779
                 URL: https://issues.apache.org/jira/browse/HDFS-13779
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: hdfs-client
            Reporter: Konstantin Shvachko


Currently {{ObserverReadProxyProvider}} inherits {{performFailover()}} method from {{ConfiguredFailoverProxyProvider}}, which simply increments the index and switches over to another NameNode. The logic for ORPP should be smart enough to choose another observer, otherwise it can switch to a SBN, where reads are disallowed, or to an ANN, which defeats the purpose of reads from standby.
This was discussed in HDFS-12976.



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