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https://issues.apache.org/jira/browse/YARN-11667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17829550#comment-17829550
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ASF GitHub Bot commented on YARN-11667:
---------------------------------------

qiuliang988 commented on PR #6648:
URL: https://github.com/apache/hadoop/pull/6648#issuecomment-2012249877

   > @qiuliang988 Thank you for your contribution! but I'm sorry, I do not 
agree with this change. We cannot always maintain backward compatibility, and 
the best approach would be to find a way to upgrade the version.
   
   @slfan1989 Thanks for your advice! I will close this PR




> Federation: ResourceRequestComparator occurs NPE when using low version of 
> hadoop submit application
> ----------------------------------------------------------------------------------------------------
>
>                 Key: YARN-11667
>                 URL: https://issues.apache.org/jira/browse/YARN-11667
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: amrmproxy
>    Affects Versions: 3.4.0
>            Reporter: qiuliang
>            Priority: Major
>              Labels: pull-request-available
>
> When a application is submitted using a lower version of hadoop and the 
> Resource Request built by AM has no ExecutionTypeRequest. After the Resource 
> Request is submitted to AMRMProxy, the NPE occurs when AMRMProxy reconstructs 
> the Allocate Request to add Resource Request to its ask



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