[jira] [Updated] (YARN-5498) [Usability] Make UI continue to work and render already loaded models even when there is no network connection

["Gour Saha (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-5498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gour Saha updated YARN-5498:
----------------------------
    Attachment: No_Internet_Connection_Sample.png

A sample UI from gmail is attached showing a small message shown when there is no network connection.

> [Usability] Make UI continue to work and render already loaded models even when there is no network connection
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-5498
>                 URL: https://issues.apache.org/jira/browse/YARN-5498
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Gour Saha
>         Attachments: No_Internet_Connection_Sample.png
>
>
> I load the UI in my browser and traverse to all the tabs. Then I disconnect the network. The tabs "Queues", "Applications" and "Nodes" continue to work even when there is no network connection. However, the "Cluster Overview" tab does not work. This tab should also continue to show the already loaded models, for better usability.
> We should also add a small message on the top of the UI when the network connection is gone. It is very similar to what gmail or other modern applications do today. An exception of type {color:red}net::ERR_INTERNET_DISCONNECTED{color} is already thrown, which can be caught and this small message can be marked visible.



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