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https://issues.apache.org/jira/browse/HADOOP-9562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13707601#comment-13707601
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Luke Lu commented on HADOOP-9562:
---------------------------------
I think this patch is a little controversial in that
# It duplicates functionality already mostly provided by existing mechanisms:
JMX and its HTTP bridge.
# The jersey stuff doesn't follow Hadoop authentication convention and doesn't
honor hadoop.http.filter.initializers to setup SPNEGO and other custom auth
filters.
# No authorization mechanism at all.
# Augmenting existing JMX mechanism is trivial (NameNodeInfoMXBean doesn't have
to be implemented by FSNameSystem, it was so for convenience).
# Returning data at the whole bean level is a limitation of the current HTTP
bridge, which is addressed by HADOOP-9160, which adopts a new popular HTTP/JSON
bridge (Jolokia) that supports advanced querying mechanism with both batch and
attribute level queries along with first class language bindings for Perl,
Python and Javascript.
> Create REST interface for HDFS health data
> ------------------------------------------
>
> Key: HADOOP-9562
> URL: https://issues.apache.org/jira/browse/HADOOP-9562
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 3.0.0, 2.0.4-alpha
> Reporter: Trevor Lorimer
> Priority: Minor
> Attachments: HADOOP-9562.diff
>
>
> The HDFS health screen (dfshealth.jsp) displays basic Version, Security and
> Health information concerning the NameNode, currently this information is
> accessible from classes in the org.apache.hadoop,hdfs.server.namenode package
> and cannot be accessed outside the NameNode. This becomes prevalent if the
> data is required to be displayed using a new user interface.
> The proposal is to create a REST interface to expose the NameNode information
> displayed on dfshealth.jsp using GET methods. Wrapper classes will be created
> to serve the data to the REST root resource within the hadoop-hdfs project.
> This will enable the HDFS health screen information to be accessed remotely.
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