[jira] [Updated] (HDFS-16316) Improve DataNode to calculate used capacity

["JiangHua Zhu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-16316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

JiangHua Zhu updated HDFS-16316:
--------------------------------
    Attachment: screenshot-4.png

> Improve DataNode to calculate used capacity
> -------------------------------------------
>
>                 Key: HDFS-16316
>                 URL: https://issues.apache.org/jira/browse/HDFS-16316
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.9.2
>            Reporter: JiangHua Zhu
>            Assignee: JiangHua Zhu
>            Priority: Major
>         Attachments: screenshot-1.png, screenshot-2.png, screenshot-3.png, screenshot-4.png
>
>
> Something unusual happened in the online environment.
> The DataNode is configured with 11 disks (${dfs.datanode.data.dir}). It is normal for 10 disks to calculate the used capacity, and the calculated value for the other 1 disk is much larger, which is very strange.
> This is about the live view on the NameNode:
>  !screenshot-1.png! 
> This is about the live view on the DataNode:
>  !screenshot-2.png! 
> We can look at the view on linux:
>  !screenshot-3.png! 
> There is a big gap here, regarding'/mnt/dfs/11/data'. This situation should be prohibited from happening.



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