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https://issues.apache.org/jira/browse/HDFS-13522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16461972#comment-16461972
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Chao Sun commented on HDFS-13522:
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Thanks [~elgoiri]. One thing I'm not certain is that observer reads can be
enabled/disabled on the client side (e.g., via {{StandbyReadProxyProvider}} and
some config key). How this can be reflected in the {{RouterRpcClient}} which
sits on the server side?
> Support observer node from Router-Based Federation
> --------------------------------------------------
>
> Key: HDFS-13522
> URL: https://issues.apache.org/jira/browse/HDFS-13522
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: federation, namenode
> Reporter: Erik Krogen
> Priority: Major
>
> Changes will need to occur to the router to support the new observer node.
> One such change will be to make the router understand the observer state,
> e.g. {{FederationNamenodeServiceState}}.
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