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Posted to common-issues@hadoop.apache.org by "Jeongin Ju (Jira)" <ji...@apache.org> on 2021/08/23 08:50:00 UTC

[jira] [Updated] (HADOOP-17859) DNS Query on DNS Registry got connection timed out at times.

     [ https://issues.apache.org/jira/browse/HADOOP-17859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jeongin Ju updated HADOOP-17859:
--------------------------------
    Attachment: HADOOP-17859.001.patch

> 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
>             Fix For: 3.1.2
>
>         Attachments: HADOOP-17859.001.patch
>
>
> 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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