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https://issues.apache.org/jira/browse/YARN-8600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16565792#comment-16565792
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Shane Kumpf commented on YARN-8600:
-----------------------------------
Thanks for the updated patch [~eyang]! +1 on the 003 patch. I've committed this
to trunk, branch-3.1.1, and branch-3.1.
> RegistryDNS hang when remote lookup does not reply
> --------------------------------------------------
>
> Key: YARN-8600
> URL: https://issues.apache.org/jira/browse/YARN-8600
> Project: Hadoop YARN
> Issue Type: Bug
> Components: yarn
> Affects Versions: 3.1.0
> Reporter: Eric Yang
> Assignee: Eric Yang
> Priority: Critical
> Fix For: 3.2.0, 3.1.1
>
> Attachments: YARN-8600.001.patch, YARN-8600.002.patch,
> YARN-8600.003.patch
>
>
> If lookup type mismatch with the record to query, remote DNS server might not
> reply. For example looking up a CNAME record with a PTR address:
> 1.76.27.172.in-addr.arpa. This can hang registryDNS.
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