Weiwei Yang commented on HDFS-10888:

Firebugs or chrome develop tools, they will both give you some more 
information. And additionally, check if namenode log contains any suspicious 
error. The UI was supposed to show a warning dialog when there is communication 
errors, not sure what happened here. 

> dfshealth.html#tab-datanode
> ---------------------------
>                 Key: HDFS-10888
>                 URL: https://issues.apache.org/jira/browse/HDFS-10888
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ui
>    Affects Versions: 2.7.3
>            Reporter: Alexey Ivanchin
>            Assignee: Weiwei Yang
> When you click on the tab NN:50070/dfshealth.html#tab-overview i see live 
> datanode and other info. 
> When you click on the tab NN:50070/dfshealth.html#tab-datanode I see a blank 
> page. How to fix?

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