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https://issues.apache.org/jira/browse/HDFS-14327?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fengnan Li updated HDFS-14327:
------------------------------
    Summary: Using FQDN instead of IP to access servers with DNS resolving  
(was: Using FQDN instead of IP for DNS resolving)

> Using FQDN instead of IP to access servers with DNS resolving
> -------------------------------------------------------------
>
>                 Key: HDFS-14327
>                 URL: https://issues.apache.org/jira/browse/HDFS-14327
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Fengnan Li
>            Assignee: Fengnan Li
>            Priority: Major
>         Attachments: HDFS-14327.001.patch
>
>
> With [HDFS-14118|https://issues.apache.org/jira/browse/HDFS-14118], clients 
> can get the IP of the servers (NN/Routers) and use the IP addresses to access 
> the machine. This will fail in secure environment as Kerberos is using the 
> domain nameĀ  (FQDN) in the principal so it won't recognize the IP addresses.
> This task is mainly adding a reverse look up on the current basis and get the 
> domain name after the IP is fetched. After that clients will still use the 
> domain name to access the servers.



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