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https://issues.apache.org/jira/browse/HDFS-11335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15821648#comment-15821648
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Yiqun Lin commented on HDFS-11335:
----------------------------------

Thanks [~manojg] for catching this. I am thinking if we can remove another 
unused variable {{writePacketSize}} in {{DNConf.java}}. This variable has been 
defined in {{DfsClientConf}} and it mainly used by hdfs-client.

> Remove HdfsClientConfigKeys.DFS_CLIENT_SLOW_IO_WARNING_THRESHOLD_KEY usage 
> from DNConf
> --------------------------------------------------------------------------------------
>
>                 Key: HDFS-11335
>                 URL: https://issues.apache.org/jira/browse/HDFS-11335
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Manoj Govindassamy
>            Assignee: Manoj Govindassamy
>         Attachments: HDFS-11335.01.patch
>
>
> DataNode configuration {{DNConf}} reading in   
> {{HdfsClientConfigKeys.DFS_CLIENT_SLOW_IO_WARNING_THRESHOLD_KEY}} 
> (_dfs.client.slow.io.warning.threshold.ms_) is redundant as this threshold 
> limit is needed only for {{DfsClientConf}}. Better to remove the unwanted 
> usage in DNConf. 



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