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https://issues.apache.org/jira/browse/HADOOP-6364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779489#action_12779489
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Steve Loughran commented on HADOOP-6364:
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# It might make sense to have options for the namenode and job tracker, 
something with different config names for each, so a single configuration can 
define both. 
# It could still be important for some people to say "come up on all 
interfaces, localhost included", which could imply it should be a list.
# There's also the problem that the namenode has historically been very fussy 
about what hostname was used to refer to it

> add a 'hostname' or 'identity' parameter
> ----------------------------------------
>
>                 Key: HADOOP-6364
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6364
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Allen Wittenauer
>
> There was a bit of talk about HDFS-34 last night at Apachecon.  One of the 
> points brought up was the difficulty in assuming that the 'hostname' was 
> externally available.  Perhaps what needs to happen instead is to follow what 
> httpd and a few other apps do.  That is provide a way for the service to know 
> what hostname to advertise itself as and use in all communications.  This 
> could also help solve the multi-nic problems (HADOOP-6210) faced when using 
> hadoop in a HA environment.

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