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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-685) DataNode appears to require DNS name resolution as opposed to direct ip mapping
Date Tue, 06 Feb 2007 19:42:06 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12470708

Raghu Angadi commented on HADOOP-685:

Have you tried setting "dfs.datanode.dns.interface" (set to something like eth0)? Would that
work in the above case?

> DataNode appears to require DNS name resolution as opposed to direct ip mapping
> -------------------------------------------------------------------------------
>                 Key: HADOOP-685
>                 URL: https://issues.apache.org/jira/browse/HADOOP-685
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>         Environment: osx, ubuntu 6.10b
>            Reporter: James Todd
>         Assigned To: Raghu Angadi
>            Priority: Minor
> DataNode appears to require DNS resolution of nodes via the class org.apache.hadoop.net.DNS
as opposed being able to use a specified ip.
> as an example, i was not able to set up more then one instance of dfs datanodes on one
box using loopback w/ varying ports since DataNode
> resolved the ip of to be "foo.bar" which was then mapped to the dhcp allocated
ip of 192.168.0.***, which was not addressable by the
> rest of the dfs cluster (namely namenode).
> while this example is trivial one should be able to use the very same process yet change
only the ip's of the nodes and have things work as
> expected.
> it would be nice to not always require nds resolution.

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