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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (YARN-9297) Renaming RM could cause application to crash
Date Wed, 13 Feb 2019 00:52:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-9297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aihua Xu resolved YARN-9297.
----------------------------
    Resolution: Duplicate

> Renaming RM could cause application to crash
> --------------------------------------------
>
>                 Key: YARN-9297
>                 URL: https://issues.apache.org/jira/browse/YARN-9297
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 2.6.0
>            Reporter: Aihua Xu
>            Priority: Major
>
> In this line, we are throwing UnknownHostException when any RM host can't resolve to
ip address. 
> https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/SecurityUtil.java#L448
> There are some cases that one RM needs to rename or map to different ip address, then
it will crash the application although other RMs are running fine. 



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