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Arpit Gupta commented on AMBARI-2916:
-------------------------------------
The config on the namenode needs to be the correct one before your run the above command.
> DataNode cannot be started on a host that was added post-install
> ----------------------------------------------------------------
>
> Key: AMBARI-2916
> URL: https://issues.apache.org/jira/browse/AMBARI-2916
> Project: Ambari
> Issue Type: Task
> Components: client
> Affects Versions: 1.4.0
> Reporter: Nate Cole
> Assignee: Nate Cole
> Fix For: 1.4.0
>
>
> The properties for hdfs-site/dfs.hosts and hdfs-site/dfs.hosts.exclude are generated
on install (and config change). When creating a datanode post-install, the files get updated,
but requires a restart of the NN in order to for it to read the new entry. In a normal install,
DN should be able to register themselves without any restart.
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