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https://issues.apache.org/jira/browse/HADOOP-11308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14216694#comment-14216694
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Benoy Antony commented on HADOOP-11308:
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The fix is tested along with HDFS-7390 and manually.
> Enable JMX to directly output JSON objects instead JSON strings
> ---------------------------------------------------------------
>
> Key: HADOOP-11308
> URL: https://issues.apache.org/jira/browse/HADOOP-11308
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 2.5.1
> Reporter: Benoy Antony
> Assignee: Benoy Antony
> Attachments: HADOOP-11308.patch, HADOOP-11308.patch
>
>
> Currently many JMX beans provide Json content as strings.
> JMXJsonServlet outputs these as Json Strings. This also results in losing
> the original Json object structure.
> An example is given below:
> {code}
> "TieredStorageStats" :
> "{\"ARCHIVE\":{\"capacityTotal\":1498254102528,\"capacityUsed\":12288,\"capacityRemaining\":980102602752,\"blockPoolUsed\":12288,\"nodesInService\":3,\"numBlocks\":0}...
> {code}
> {code}
> "TieredStorageStats" :
> {"ARCHIVE":{"capacityTotal":1498254102528,"capacityUsed":12288,"capacityRemaining":980102602752,"blockPoolUsed":12288,"nodesInService":3,"numBlocks":0}...
> {code}
> In the former output {{TieredStorageStats}} maps to a JSON string while in
> the latter one it maps to a JSON object.
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