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https://issues.apache.org/jira/browse/HBASE-22459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16852557#comment-16852557
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Hudson commented on HBASE-22459:
--------------------------------

Results for branch branch-1
        [build #860 on 
builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-1/860/]: 
(x) *{color:red}-1 overall{color}*
----
details (if available):

(x) {color:red}-1 general checks{color}
-- For more information [see general 
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1/860//General_Nightly_Build_Report/]


(x) {color:red}-1 jdk7 checks{color}
-- For more information [see jdk7 
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1/860//JDK7_Nightly_Build_Report/]


(x) {color:red}-1 jdk8 hadoop2 checks{color}
-- For more information [see jdk8 (hadoop2) 
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1/860//JDK8_Nightly_Build_Report_(Hadoop2)/]




(x) {color:red}-1 source release artifact{color}
-- See build output for details.


> Expose store reader reference count
> -----------------------------------
>
>                 Key: HBASE-22459
>                 URL: https://issues.apache.org/jira/browse/HBASE-22459
>             Project: HBase
>          Issue Type: Improvement
>          Components: HFile, metrics, regionserver
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Minor
>             Fix For: 3.0.0, 1.5.0, 2.3.0
>
>         Attachments: HBASE-22459-branch-1.patch, HBASE-22459-branch-1.patch, 
> HBASE-22459-branch-1.patch, HBASE-22459-branch-2.patch, 
> HBASE-22459-branch-2.patch, HBASE-22459-branch-2.patch, HBASE-22459.patch, 
> HBASE-22459.patch, HBASE-22459.patch
>
>
> Expose the reference count over a region's store file readers as a metric in 
> region metrics and also as a new field in RegionLoad. This will make visible 
> the reader reference count over all stores in the region to both metrics 
> capture and anything that consumes ClusterStatus, like the shell's status 
> command and the master UI.
> Coprocessors that wrap scanners might leak them, which will leak readers. We 
> log when this happens but in order to notice the increasing trend of 
> reference counts you have to scrape log output. It would be better if this 
> information is also available as a metric.



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