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https://issues.apache.org/jira/browse/HDFS-1357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12904845#action_12904845
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Dmytro Molkov commented on HDFS-1357:
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The patch looks good to me.
+1
Keep in mind though that I have an outstanding patch HDFS-1291 that will only
open the client port on the namenode once it is out of safemode.
Thus HFTP will not be accessible until the namenode is fully up. Which can
actually be a good thing because we are preventing clients from hitting the
namenode when it is starting up.
> HFTP traffic served by DataNode shouldn't use service port on NameNode
> -----------------------------------------------------------------------
>
> Key: HDFS-1357
> URL: https://issues.apache.org/jira/browse/HDFS-1357
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node, security
> Reporter: Kan Zhang
> Assignee: Kan Zhang
> Attachments: h1357-01.patch
>
>
> HDFS-599 introduced a new service port on NameNode to separate system traffic
> (e.g., heartbeats/blockreports) from client file access requests so that they
> can be prioritized. All Datanode traffic now goes to the service port.
> However, datanode also serves as a proxy for HFTP requests from client
> (served by StreamFile servlet). These HFTP traffic should continue to use the
> client port on NameNode. Moreover, using the service port for HFTP is
> incompatible with the existing way of selecting delegation tokens.
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