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https://issues.apache.org/jira/browse/HADOOP-6728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910849#action_12910849
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Eric Yang commented on HADOOP-6728:
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With this change, would it be possible to send job related metrics through this
code path? I.e. Stuff that implements org.apache.hadoop.mapred.Reporter
interface. How about provide an example of REST style API for query when
plugin is registered through MetricsSource code path?
> Overhaul metrics framework
> --------------------------
>
> Key: HADOOP-6728
> URL: https://issues.apache.org/jira/browse/HADOOP-6728
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 0.20.2
> Reporter: Luke Lu
> Assignee: Luke Lu
> Fix For: 0.22.0
>
> Attachments: hadoop-6728-y20.104.patch, metrics1-flow.png,
> metrics2-builder-r2.png, metrics2-builder.png, metrics2-flow.png,
> metrics2-mutable-r2.png, metrics2-mutable.png, metrics2-record-r2.png,
> metrics2-record.png, metrics2-uml-r2.png, metrics2-uml.png
>
>
> Per discussions with Arun, Chris, Hong and Rajiv, et al, we concluded that
> the current metrics framework needs an overhaul to:
> * Allow multiple plugins for different monitoring systems simultaneously (see
> also: HADOOP-6508).
> * Refresh metrics plugin config without server restart.
> ** Including filtering of metrics per plugin.
> * Support metrics schema for plugins.
> The jira will be resolved when core hadoop components (hdfs, mapreduce) are
> updated to use the new framework . Updates to external components that use
> the existing metrics framework will be tracked by different issues.
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