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https://issues.apache.org/jira/browse/HDFS-12976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16514920#comment-16514920
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Konstantin Shvachko commented on HDFS-12976:
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??{{ConfiguredFailoverProxyProvider}} and received a read request, then the
proxy may forward this request to a observer node, right???
As we talked yesterday, the behavior of {{ConfiguredFailoverProxyProvider}}
should remain unchanged, that is it will talk only to Active NN.
{{ObserverReadProxyProvider}} will be used to read from ObserverNode. The only
new thing for {{ConfiguredFailoverProxyProvider}} is that during fail-over it
should connect to Active NN, and avoid both Standby and Observer nodes. We
should create a new jira to fix this in trunk.
> 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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