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https://issues.apache.org/jira/browse/HDFS-12976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16505080#comment-16505080
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Chao Sun commented on HDFS-12976:
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Thanks [~vagarychen]! I addressed most of your comments except this one:
bq. HATestUtil#configureObserverReadFs, seems to be sharing most of the lines
with configureFailoverFs, may be simplify to just set the configure key
PROXY_PROVIDER_KEY_PREFIX then call into configureFailoverFs?
The reason for the sharing is that {{setFailoverConfigurations}} inside
{{configureFailoverFs}} will overwrite the config and set it to the existing
{{ConfiguredFailoverProxyProvider}} class. We can change that function to
accept an extra parameter about the class but it also involves many changes,
since it is heavily overloaded.
> Introduce StandbyReadProxyProvider
> ----------------------------------
>
> 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.WIP.patch
>
>
> {{StandbyReadProxyProvider}} should implement {{FailoverProxyProvider}}
> interface and be able to submit read requests to ANN and SBN(s).
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