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Posted to common-issues@hadoop.apache.org by "Colin Patrick McCabe (JIRA)" <ji...@apache.org> on 2015/09/14 22:53:46 UTC

[jira] [Commented] (HADOOP-12405) Expose NN RPC via HTTP / HTTPS

    [ https://issues.apache.org/jira/browse/HADOOP-12405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14744241#comment-14744241 ] 

Colin Patrick McCabe commented on HADOOP-12405:
-----------------------------------------------

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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