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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9090) Support on-demand publish of metrics
Date Mon, 03 Dec 2012 14:37:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13508766#comment-13508766
] 

Hudson commented on HADOOP-9090:
--------------------------------

Integrated in Hadoop-trunk-Commit #3085 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/3085/])
    HADOOP-9090. Support on-demand publish of metrics. Contributed by Mostafa Elhemali. (Revision
1416538)

     Result = SUCCESS
suresh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1416538
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/MetricsSystem.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsSinkAdapter.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsSystemImpl.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/metrics2/impl/TestGangliaMetrics.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/metrics2/impl/TestMetricsSystemImpl.java

                
> Support on-demand publish of metrics
> ------------------------------------
>
>                 Key: HADOOP-9090
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9090
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: metrics
>            Reporter: Mostafa Elhemali
>            Assignee: Mostafa Elhemali
>            Priority: Minor
>             Fix For: 2.0.3-alpha
>
>         Attachments: HADOOP-9090.2.patch, HADOOP-9090.justEnhanceDefaultImpl.2.patch,
HADOOP-9090.justEnhanceDefaultImpl.3.patch, HADOOP-9090.justEnhanceDefaultImpl.4.patch, HADOOP-9090.justEnhanceDefaultImpl.5.patch,
HADOOP-9090.justEnhanceDefaultImpl.6.patch, HADOOP-9090.justEnhanceDefaultImpl.7.patch, HADOOP-9090.justEnhanceDefaultImpl.8.patch,
HADOOP-9090.justEnhanceDefaultImpl.9.patch, HADOOP-9090.justEnhanceDefaultImpl.patch, HADOOP-9090.patch
>
>
> Updated description based on feedback:
> We have a need to publish metrics out of some short-living processes, which is not really
well-suited to the current metrics system implementation which periodically publishes metrics
asynchronously (a behavior that works great for long-living processes). Of course I could
write my own metrics system, but it seems like such a waste to rewrite all the awesome code
currently in the MetricsSystemImpl and supporting classes.
> The way this JIRA solves this problem is adding a new method publishMetricsNow() to the
MetricsSystemImpl() class, that does a synchronous out-of-band push of the metrics from the
sources to the sink. I also add a method to MetricsSinkAdapter (putMetricsImmediate) to support
that change.

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