[jira] [Commented] (TEZ-2870) Tez UI: DAG status is not correct when application history is not accessible.

["Hitesh Shah (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TEZ-2870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14948061#comment-14948061 ] 

Hitesh Shah commented on TEZ-2870:
----------------------------------

This is an edge case when the application crashes with the AM not fulling pushing info to Timeline. 

Some points to note:
   - to check if the DAG has completed ( when timeline does not have a final dag status), check RM to see if yarn application has completed. 
   - If the RM does not have data in its memory, it will try and get the data from application history if system metrics publisher is enabled
   - One thing that is guaranteed is that if the RM does not have it in its memory, this means that the app has completed ( final status unknown ) 




> Tez UI: DAG status is not correct when application history is not accessible.
> -----------------------------------------------------------------------------
>
>                 Key: TEZ-2870
>                 URL: https://issues.apache.org/jira/browse/TEZ-2870
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Sreenath Somarajapuram
>
> When data is available in RM use RM API to correct the final DAG status than application history.



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