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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14282) Remove metrics2
Date Fri, 21 Aug 2015 17:31:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14707089#comment-14707089
] 

Elliott Clark commented on HBASE-14282:
---------------------------------------

[~busbey] Yeah switching to dropwizards was my thought. Metrics2 has just been awful to work
with. 
* It tries to cache things in places that make working with it hard. 
* Removing metrics is awful at best.
* Adding more metrics means way too much work.
* It's testability is awful because hadoop mangles names.

> Remove metrics2
> ---------------
>
>                 Key: HBASE-14282
>                 URL: https://issues.apache.org/jira/browse/HBASE-14282
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics
>            Reporter: Elliott Clark
>            Priority: Critical
>             Fix For: 2.0.0
>
>
> Metrics2 has a whole bunch of race conditions and weird edges because of all of the caching
that metrics2 does.
> Additionally tying something so integral to hadoop who has lots of versions we support
has been a maintenance nightmare. It would allow us to completely get rid of the compat modules.
> Rip it out.



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