[jira] [Commented] (HBASE-3859) Increment a counter when a Scanner lease expires

["Esteban Gutierrez (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-3859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15671687#comment-15671687 ] 

Esteban Gutierrez commented on HBASE-3859:
------------------------------------------

Sounds helpful to have, specially now that we have a better metrics framework.

> Increment a counter when a Scanner lease expires
> ------------------------------------------------
>
>                 Key: HBASE-3859
>                 URL: https://issues.apache.org/jira/browse/HBASE-3859
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics, regionserver
>    Affects Versions: 2.0.0
>            Reporter: Benoit Sigoure
>            Assignee: Mubarak Seyed
>            Priority: Minor
>              Labels: beginner
>         Attachments: HBASE-3859.trunk.v1.patch
>
>
> Whenever a Scanner lease expires, the RegionServer will close it automatically and log a message to complain.  I would like the RegionServer to increment a counter whenever this happens and expose this counter through the metrics system, so we can plug this into our monitoring system (OpenTSDB) and keep track of how frequently this happens.  It's not supposed to happen frequently so it's good to keep an eye on it.



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