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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-7731) RegistryDNS should handle upstream DNS returning CNAME
Date Fri, 12 Jan 2018 01:24:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-7731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Yang updated YARN-7731:
----------------------------
    Attachment: YARN-7731.003.patch

- Added detection to prevent infinite recursive lookup for cname records.

> RegistryDNS should handle upstream DNS returning CNAME
> ------------------------------------------------------
>
>                 Key: YARN-7731
>                 URL: https://issues.apache.org/jira/browse/YARN-7731
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Billie Rinaldi
>            Assignee: Eric Yang
>         Attachments: YARN-7731.001.patch, YARN-7731.002.patch, YARN-7731.003.patch
>
>
> When RegistryDNS performs a lookup in an upstream DNS server and a CNAME record is retrieved,
it returns a response with only the CNAME record (there is no A record, meaning no IP address
is resolved). RegistryDNS should perform a lookup on the new name from the CNAME record in
an attempt to find an A record, which would provide an IP address.



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