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https://issues.apache.org/jira/browse/YARN-9954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17083814#comment-17083814
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Surendra Singh Lilhore commented on YARN-9954:
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{quote}Also, this jira will be useful to have in older minor versions. But we 
cannot remove @Evolving fields within a minor version. Shall we open a separate 
jira to remove these fields, and in this jira set 
DEFAULT_RM_APPLICATION_MAX_TAGS to APPLICATION_MAX_TAGS and set 
DEFAULT_RM_APPLICATION_MAX_TAG_LENGTH to APPLICATION_MAX_TAG_LENGTH ?
{quote}
Better now mark it deprecated now and remove it in hadoop 3.4.0.

> Configurable max application tags and max tag length
> ----------------------------------------------------
>
>                 Key: YARN-9954
>                 URL: https://issues.apache.org/jira/browse/YARN-9954
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Jonathan Hung
>            Assignee: Bilwa S T
>            Priority: Major
>         Attachments: YARN-9954.001.patch
>
>
> Currently max tags and max tag length is hardcoded, it should be configurable
> {noformat}
> @Evolving
> public static final int APPLICATION_MAX_TAGS = 10;
> @Evolving
> public static final int APPLICATION_MAX_TAG_LENGTH = 100; {noformat}



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