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https://issues.apache.org/jira/browse/HADOOP-17859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18040921#comment-18040921
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ASF GitHub Bot commented on HADOOP-17859:
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github-actions[bot] closed pull request #3323: HADOOP-17859. Fix to avoid
connection timed out when UDP DNS Query on DNS Registry
URL: https://github.com/apache/hadoop/pull/3323
> DNS Query on DNS Registry got connection timed out at times.
> ------------------------------------------------------------
>
> Key: HADOOP-17859
> URL: https://issues.apache.org/jira/browse/HADOOP-17859
> Project: Hadoop Common
> Issue Type: Bug
> Components: registry
> Reporter: Jeongin Ju
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.1.2
>
> Attachments: HADOOP-17859.001.patch
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> DNS query on YARN Registry DNS got connection timed out at times.
>
> After checking logs on registry dns, we found the cause that size of UDP
> Response is greater than Preallocated Byte buffer(4096)
>
> We added failsafe case by returning input query with TC flag so that client
> can know they should retried using TCP protocol.
>
>
> We found the problem and patched our cluster on 3.1.2 but it seems trunk
> still has the same problem.
> I attached patch based on the trunk.
>
> Thanks!
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