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https://issues.apache.org/jira/browse/HDFS-12976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16525875#comment-16525875
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Erik Krogen commented on HDFS-12976:
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I think to pursue an approach like [~shv]'s, we need to define some new
protocol, e.g. {{HAStatusProtocol}}, which {{HAServiceProtocol}} and
{{ClientProtocol}} (and others?) both extend, and has just one method like
{{getServiceState()}}. By having a separate protocol we can define the ACLs
differently, and set up inheritance for proper casting.
> 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-HDFS-12943.004.patch,
> HDFS-12976-HDFS-12943.005.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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