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https://issues.apache.org/jira/browse/HDFS-2197?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-2197:
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    Attachment: hdfs-2197-2.txt

I did the refactor again on trunk. If this looks good, I will do it again for 
the HDFS branch, where the patch certainly won't apply. A quick review 
turnaround would be appreciated since this patch falls apart fast!

> Refactor RPC call implementations out of NameNode class
> -------------------------------------------------------
>
>                 Key: HDFS-2197
>                 URL: https://issues.apache.org/jira/browse/HDFS-2197
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2197-2.txt, hdfs-2197.txt
>
>
> For HA, the NameNode will gain a bit of a state machine, to be able to 
> transition between standby and active states. This would be cleaner in the 
> code if the {{NameNode}} class were just a container for various services, as 
> discussed in HDFS-1974. It's also nice for testing, where it would become 
> easier to construct just the RPC handlers around a mock NameSystem, with no 
> HTTP server, for example.
> This JIRA is to move all of the protocol implementations out of {{NameNode}} 
> into a separate {{NameNodeRPCServer}} class.

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