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https://issues.apache.org/jira/browse/HDFS-2086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054050#comment-13054050
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Jitendra Nath Pandey commented on HDFS-2086:
--------------------------------------------
Patch looks good to me
nit: In checkInList, can we avoid repeating (iaddr != null)?
+1 otherwise.
> If the include hosts list contains host name, after restarting namenode,
> datanodes registrant is denied
> --------------------------------------------------------------------------------------------------------
>
> Key: HDFS-2086
> URL: https://issues.apache.org/jira/browse/HDFS-2086
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.23.0
> Reporter: Tanping Wang
> Assignee: Tanping Wang
> Fix For: 0.23.0
>
> Attachments: HDFS-2086.2.patch, HDFS-2086.3.patch, HDFS-2086.4.patch,
> HDFS-2086.5.patch, HDFS-2086.6.patch, HDFS-2086.patch
>
>
> As the title describes the problem: if the include host list contains host
> name, after restarting namenodes, the datanodes registrant is denied by
> namenodes. This is because after namenode is restarted, the still alive data
> node will try to register itself with the namenode and it identifies itself
> with its *IP address*. However, namenode only allows all the hosts in its
> hosts list to registrant and all of them are hostnames. So namenode would
> deny the datanode registration.
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