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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9090) Support on-demand publish of metrics
Date Mon, 03 Dec 2012 14:08:01 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13508747#comment-13508747
] 

Hadoop QA commented on HADOOP-9090:
-----------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12555692/HADOOP-9090.justEnhanceDefaultImpl.9.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 2 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-common-project/hadoop-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/1837//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/1837//console

This message is automatically generated.
                
> 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
>            Priority: Minor
>         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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