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From "Ivan A. Veselovsky (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9281) Rework all usages of o.a.h.metrics to o.a.h.metrics2 new metrics API
Date Tue, 08 Oct 2013 18:30:44 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Ivan A. Veselovsky updated HADOOP-9281:

    Attachment: HADOOP-9281-trunk--N6--MAPREDUCE-part.patch

Hi, Daryn,
please see xxx--N6--yyy patches (apply to both trunk & branch2).
1) I removed "unnecessary" changes from the patch. Some "unnecessary" changes were initially
done to compensate pre-commit audit warnings (mostly deprecations, since the patch deprecates
old MetricsServelet), so now the patch may have problems with the number of warnings.
2) I splitted the patch into 2 pieces (hadoop-common and mr part). Yarn part is "unnecessary".

3) ServletSink.numInstances was not thread safe, right. It was so , because creation of several
Servlet instances is quite rare case, though, this is possible in theory. I fixed the thread-safety

> Rework all usages of o.a.h.metrics to o.a.h.metrics2 new metrics API
> --------------------------------------------------------------------
>                 Key: HADOOP-9281
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9281
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 3.0.0, 2.0.3-alpha, 0.23.7
>            Reporter: Ivan A. Veselovsky
>            Assignee: Ivan A. Veselovsky
>         Attachments: HADOOP-9281-branch-0.23--N5.patch, HADOOP-9281-trunk--N5.patch,
HADOOP-9281-trunk--N6--HADOOP-COMMON-part.patch, HADOOP-9281-trunk--N6--MAPREDUCE-part.patch,
> The following done:
> 1) o.a.h.metrics.MetricsServlet reworked to o.a.h.metrics2.lib.MetricsServlet2
> 2) class org.apache.hadoop.mapreduce.task.reduce.ShuffleClientMetrics rewritten to use
metrics2 API.
> 3) class org.apache.hadoop.mapred.LocalJobRunnerMetrics rewritten to use new metrics2

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