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From "Benoy Antony (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-11308) Enable JMX to directly output JSON objects instead JSON strings
Date Sat, 15 Nov 2014 16:03:34 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-11308?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benoy Antony updated HADOOP-11308:
----------------------------------
    Attachment: HADOOP-11308.patch

Attaching the patch.
If the string already is proper json content , the beans output _JsonString_ instead of _String_.
If the output is _JsonString_ , then _JMXJsonServlet_  writes it raw without additional transformation.

> 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
>
>
> 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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