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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7734) metrics2 class names inconsistent between trunk and 20x
Date Tue, 11 Oct 2011 22:13:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13125431#comment-13125431
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Todd Lipcon commented on HADOOP-7734:
-------------------------------------

bq. The only two API changes that affect plugins are:

It's not just sink plugins that are affected, but any applications that want to build against
metrics. For example, HBase is stuck using metrics1 until all of our users move to 0.23, since
we need to support both 20 and 23, and the metrics2 API is incompatible.

bq. 203-205 and some previous Y releases
Serves them right for developing a major new subsystem on 20 instead of trunk :P
                
> metrics2 class names inconsistent between trunk and 20x
> -------------------------------------------------------
>
>                 Key: HADOOP-7734
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7734
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: metrics
>    Affects Versions: 0.20.205.0, 0.23.0
>            Reporter: Todd Lipcon
>            Priority: Critical
>
> The new metrics2 framework was backported into the 20x branch, but the class names differ
between the two branches. So, if anyone were to build against the metrics2 API in 20x, it
would break when they upgraded to 23. We should reconcile the two so that they are API-compatible.

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