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https://issues.apache.org/jira/browse/HDFS-7279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14182085#comment-14182085
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Haohui Mai commented on HDFS-7279:
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The v0 patch is a prototype patch that implements webhdfs in the DN site using
netty. Currently it lacks supports for HTTPS, I'll address it in subsequent
patches.
The Netty server does not implement servlets such as jmx and conf. Instead, the
old jetty server listens on a local port, and the reverse proxy inside the
netty server will pull the data from the jetty server and serve them.
> Use netty to implement DatanodeWebHdfsMethods
> ---------------------------------------------
>
> Key: HDFS-7279
> URL: https://issues.apache.org/jira/browse/HDFS-7279
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode, webhdfs
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Attachments: HDFS-7279.000.patch
>
>
> Currently the DN implements all related webhdfs functionality using jetty. As
> the current jetty version the DN used (jetty 6) lacks of fine-grained buffer
> and connection management, DN often suffers from long latency and OOM when
> its webhdfs component is under sustained heavy load.
> This jira proposes to implement the webhdfs component in DN using netty,
> which can be more efficient and allow more finer-grain controls on webhdfs.
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