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https://issues.apache.org/jira/browse/HADOOP-3772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12620161#action_12620161
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Hadoop QA commented on HADOOP-3772:
-----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12387481/tweak_inst.patch
against trunk revision 682978.
+1 @author. The patch does not contain any @author tags.
-1 tests included. The patch doesn't appear to include any new or modified
tests.
Please justify why no tests are needed for this patch.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3011/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3011/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3011/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3011/console
This message is automatically generated.
> Proposed hadoop instrumentation API
> -----------------------------------
>
> Key: HADOOP-3772
> URL: https://issues.apache.org/jira/browse/HADOOP-3772
> Project: Hadoop Core
> Issue Type: Improvement
> Components: metrics
> Reporter: Ari Rabkin
> Assignee: Ari Rabkin
> Fix For: 0.19.0
>
> Attachments: instrumentation-2.patch, instrumentation-3.patch,
> instrumentation-4.patch, instrumentation.patch, tweak_inst.patch
>
>
> We want to evolve the Hadoop metrics subsystem into a more generic
> Instrumentation facility. The ultimate goal is to add structured logging to
> Hadoop, with causal tags, a la X-trace. The existing metrics framework is
> not quite suitable for our needs, since the implementation and interface are
> tightly coupled. There's no way to use the metrics instrumentation points for
> anything other than metricss, and there's no way for a metrics context to
> find out what event just happened.
> We want to tease apart the generic notion of hookable instrumentation points,
> from the specifics of the information recording. The latter ought to be
> pluggable at run-time.
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