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https://issues.apache.org/jira/browse/HDFS-13873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16598379#comment-16598379
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Chao Sun commented on HDFS-13873:
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I'll grab this one since we've implemented the same logic internally at Uber.
> ObserverNode should reject read requests when it is too far behind.
> -------------------------------------------------------------------
>
> Key: HDFS-13873
> URL: https://issues.apache.org/jira/browse/HDFS-13873
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client, namenode
> Affects Versions: HDFS-12943
> Reporter: Konstantin Shvachko
> Assignee: Chao Sun
> Priority: Major
>
> Add a server-side threshold for ObserverNode to reject read requests when it
> is too far behind.
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