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From "Eli Collins (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3164) Move DatanodeInfo#hostName to DatanodeID
Date Sat, 31 Mar 2012 17:18:26 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13243231#comment-13243231

Eli Collins commented on HDFS-3164:

DFS_NAMENODE_UPGRADE_PERMISSION_KEY is still used by HdfsConfiguration to log the deprecation,
so still needed, and is the only use. I noticed there's an unused import of it in FSN, I'll
remove that as well.  Thanks ATM, I'll wait to hear back from jenkins before committing. I
ran them locally and they passed so hopefully the gods are in my favor.
> Move DatanodeInfo#hostName to DatanodeID
> ----------------------------------------
>                 Key: HDFS-3164
>                 URL: https://issues.apache.org/jira/browse/HDFS-3164
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>         Attachments: hdfs-3164.txt
> Like HDFS-3138 (the ipcPort) the hostName field in DatanodeInfo is not ephemeral and
should be in DatanodeID. This also allows us to fixup the issue where the DatanodeID#name
field is overloaded (the DN sets it to a hostname, then the NN clobbers it with an IP, and
then the DN clobbers it's hostname field with this IP). If the DN can specify both a "name"
and "hostname" in the DatanodeID then this code becomes simpler. 

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