[jira] [Commented] (YARN-9729) [UI2] Fix error message for logs without ATSv2

["Prabhu Joseph (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-9729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16902905#comment-16902905 ] 

Prabhu Joseph commented on YARN-9729:
-------------------------------------

[~zsiegl] Have tested the patch on my test cluster. When ATS is healthy but there are no logs aggregated in hdfs, in this case am getting below error message which is misleading. 

{code}
Logs are unavailable because Application Timeline Service seems unhealthy.
{code}

Is it possible to separate these two cases

1. ATS is stopped or unhealthy.
2. ATS is running fine and did not return any data as logs are not aggregated.


> [UI2] Fix error message for logs without ATSv2
> ----------------------------------------------
>
>                 Key: YARN-9729
>                 URL: https://issues.apache.org/jira/browse/YARN-9729
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: yarn-ui-v2
>    Affects Versions: 3.2.0, 3.1.2
>            Reporter: Zoltan Siegl
>            Assignee: Zoltan Siegl
>            Priority: Major
>         Attachments: Screenshot 2019-08-08 at 13.23.11.png, Screenshot 2019-08-08 at 13.23.21.png, YARN-9729.001.patch, after_patch.png
>
>
> On UI2 applications page logs are not available unless ATSv2 is running. The reason for logs not to appear is unclarified on the UI.
> When ATS is reported to be unhealthy, a descriptive error message should appear. 



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