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https://issues.apache.org/jira/browse/HADOOP-12405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14744241#comment-14744241
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Colin Patrick McCabe commented on HADOOP-12405:
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webhdfs has different goals than NN RPC. In particular, NN RPC can be changed
in incompatible ways in a major release, whereas webhdfs cannot. One of the
main purposes of webhdfs was to provide a stable API for doing distcp across
versions. I do not think we should expose NN RPC calls directly unless we can
find some way to address this.
> Expose NN RPC via HTTP / HTTPS
> ------------------------------
>
> Key: HADOOP-12405
> URL: https://issues.apache.org/jira/browse/HADOOP-12405
> Project: Hadoop Common
> Issue Type: New Feature
> Reporter: Haohui Mai
>
> WebHDFS needs to expose NN RPC calls to allow users to access HDFS via HTTP /
> HTTPS.
> The current approach is to add REST APIs into WebHDFS one by one manually. It
> requires significant efforts from a maintainability point of view. we found
> that WebHDFS is consistently lagging behind. It's also hard to maintain the
> REST RPC stubs.
> There are a lot of values to expose the NN RPC in a HTTP / HTTPS friendly way
> automatically.
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