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From "Erik Krogen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12976) Introduce ObserverReadProxyProvider
Date Fri, 15 Jun 2018 16:31:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16514055#comment-16514055

Erik Krogen commented on HDFS-12976:

Hey [~csun], I don't see why the changes to {{ConfiguredFailoverProxyProvider#performFailover()}}
are necessary. The intent is that you increment the proxy index, then try it, and if the proxy
is in the wrong state it will throw an exception and {{performFailover()}} will be called
again. This process should work fine without the {{isObserverState}} check.

> Introduce ObserverReadProxyProvider
> -----------------------------------
>                 Key: HDFS-12976
>                 URL: https://issues.apache.org/jira/browse/HDFS-12976
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>            Reporter: Konstantin Shvachko
>            Assignee: Chao Sun
>            Priority: Major
>         Attachments: HDFS-12976-HDFS-12943.000.patch, HDFS-12976-HDFS-12943.001.patch,
HDFS-12976-HDFS-12943.002.patch, HDFS-12976-HDFS-12943.003.patch, HDFS-12976.WIP.patch
> {{StandbyReadProxyProvider}} should implement {{FailoverProxyProvider}} interface and
be able to submit read requests to ANN and SBN(s).

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