[jira] [Updated] (YARN-4254) ApplicationAttempt stuck for ever due to UnknownHostexception

["Jason Lowe (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-4254?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jason Lowe updated YARN-4254:
-----------------------------
    Summary: ApplicationAttempt stuck for ever due to UnknownHostexception  (was: ApplicationAttempt stuck for ever due to UnknowHostexception)

Thanks for updating the patch!  +1 lgtm.  Committing this.

> ApplicationAttempt stuck for ever due to UnknownHostexception
> -------------------------------------------------------------
>
>                 Key: YARN-4254
>                 URL: https://issues.apache.org/jira/browse/YARN-4254
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Bibin A Chundatt
>            Assignee: Bibin A Chundatt
>            Priority: Major
>         Attachments: 0001-YARN-4254.patch, Logs.txt, Test.patch, YARN-4254.002.patch, YARN-4254.003.patch
>
>
> Scenario
> =======
> 1. RM HA and 5 NMs available in cluster and are working fine 
> 2. Add one more NM to the same cluster but RM /etc/hosts not updated.
> 3. Submit application to the same cluster
> If Am get allocated to the newly added NM the *application attempt will get stuck for ever*.User will not get to know why the same happened.
> Impact
> 1.RM logs gets overloaded with exception
> 2.Application gets stuck for ever.
> Handling suggestion YARN-261 allows for Fail application attempt .
> If we fail the same next attempt could get assigned to another NM.



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