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From "Billie Rinaldi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6655) We should validate yarn native services application submission side to ensure that the hostname should be less than 63 characters
Date Fri, 26 May 2017 21:38:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-6655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16026888#comment-16026888
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Billie Rinaldi commented on YARN-6655:
--------------------------------------

Thanks for taking a look, [~aw]! It looks like it is dnsjava that is making the 63 character
restriction on label length:
https://github.com/dnsjava/dnsjava/blob/master/org/xbill/DNS/Name.java#L48

Good point that this validation only needs to be performed if RegistryDNS is enabled. I found
another issue with my patch as well: component names become longer when unique names is turned
on, which means a counter is appended to the name.

>  We should validate yarn native services application submission side to ensure that the
hostname should be less than 63 characters
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-6655
>                 URL: https://issues.apache.org/jira/browse/YARN-6655
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn-native-services
>    Affects Versions: yarn-native-services
>            Reporter: Karam Singh
>            Assignee: Billie Rinaldi
>             Fix For: yarn-native-services
>
>         Attachments: YARN-6655-yarn-native-services.001.patch
>
>
> According to RFC 1035 the length of a FQDN is limited to 255 characters, and each label
(node delimited by a dot in the hostname) is limited to 63 characters
> So  We should validate yarn native services application submission side to ensure that
the hostname should be less than 63 characters



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