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https://issues.apache.org/jira/browse/HDFS-17124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17747200#comment-17747200
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Simbarashe Dzinamarira commented on HDFS-17124:
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Setting "dfs.client.rbf.observer.enable=true" may enable observer reads
unintentionally for clients that use the IPFailoverProxyProvider.
> RBF: RouterObserverReadProxyProvider should respect observer read opt-out via
> dfs.client.rbf.observer.enable flag.
> ------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-17124
> URL: https://issues.apache.org/jira/browse/HDFS-17124
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Simbarashe Dzinamarira
> Assignee: Simbarashe Dzinamarira
> Priority: Minor
>
> The "dfs.client.rbf.observer.enable" flag was add to allow a client using
> IPFailoverProxyProvider to use observer reads with routers.
> Now we have implemented the RouterObserverReadProxyProvider which better
> supported observer reads, i.e performing msync automatically.
> In our environment, we still have clients that opted out of observer reads by
> setting "dfs.client.rbf.observer.enable
> =false". The RouterObserverReadProxyProvider should respect the opt-out
> decision of these clients.
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