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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1202) Jobtracker & Namenode can only bind to one interface
Date Wed, 25 Apr 2007 21:58:15 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12491806
] 

Raghu Angadi commented on HADOOP-1202:
--------------------------------------

bq. ... I need to talk to my namenode to retrieve the results of my jobs. ...

So you need to read some files from HDFS?. ie. you need to be able to talk to a datanode on
the same interface that datanode talks to Namenode ( since that is the ip address namenode
gives you ). This jira will help you only if you currently can talk to datanodes but not to
namenode. Correct?


> Jobtracker & Namenode can only bind to one interface
> ----------------------------------------------------
>
>                 Key: HADOOP-1202
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1202
>             Project: Hadoop
>          Issue Type: Bug
>            Reporter: Michael Bieniosek
>         Attachments: bind-all-addresses.patch
>
>
> There is no way to tell the jobtracker & namenode to listen on more than one interface.
 Because of firewall rules etc., my datanodes/tasktrackers and human users live on different
networks, and so talk to the jobtracker/namenode on different interfaces.
> Currently, the namenode will bind to the hostname specified in configuration in fs.default.name,
and the jobtracker will bind to the hostname in mapred.job.tracker.  These names are also
reported to datanode and tasktracker clients.
> Consequently, putting a fqhn in these fields causes the server to only listen on the
interface serving that fqhn.  Putting 0.0.0.0 in these fields causes the server to report
0.0.0.0 as its address to clients, which confuses the clients and causes them to fail.

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