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https://issues.apache.org/jira/browse/HDFS-15118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17035537#comment-17035537
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Chen Liang commented on HDFS-15118:
-----------------------------------

[~ayushtkn] I already filed HDFS-15153 for fixing this test, just haven't got 
the bandwidth to work on it. I have taken a quick look and I think it was 
caused by a previous fix, not this one.

> [SBN Read] Slow clients when Observer reads are enabled but there are no 
> Observers on the cluster.
> --------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-15118
>                 URL: https://issues.apache.org/jira/browse/HDFS-15118
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 2.10.0
>            Reporter: Konstantin Shvachko
>            Assignee: Chen Liang
>            Priority: Major
>             Fix For: 3.3.0, 3.1.4, 3.2.2, 2.10.1
>
>         Attachments: HDFS-15118.001.patch, HDFS-15118.002.patch
>
>
> We see substantial degradation in performance of HDFS clients, when Observer 
> reads are enabled via {{ObserverReadProxyProvider}}, but there are no 
> ObserverNodes on the cluster.



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