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https://issues.apache.org/jira/browse/HBASE-16686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15527253#comment-15527253
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Guang Yang commented on HBASE-16686:
------------------------------------

Thanks [~apurtell] for the review.

{quote}
Convention across the code base is to use EnvironmentEdgeManager#getTime() 
instead of System#currentTimeMillis so the time can be controlled in unit tests
{quote}
Thanks for pointing that out, will update the patch accordingly.

{quote}
While a simple count of exceptions could be useful, does it make sense to break 
down the counts for common exceptions of interest?
{quote}
Yeah that would be helpful, let me take a look at the common exceptions that we 
may report individually.

As for this patch, I will first focus on getting Jetty 9 work 
(https://issues.apache.org/jira/browse/HBASE-12894), and then consolidate a 
patch for metrics, since it would be helpful to have some metrics from Jetty as 
well (e.g. queue length, busy/idle threads, etc.).

> Add latency metrics for REST
> ----------------------------
>
>                 Key: HBASE-16686
>                 URL: https://issues.apache.org/jira/browse/HBASE-16686
>             Project: HBase
>          Issue Type: New Feature
>          Components: monitoring, REST
>            Reporter: Guang Yang
>            Priority: Minor
>         Attachments: HBASE-16686_v0.patch
>
>
> It would be helpful to have the latency metrics for rest for various 
> operations.



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