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https://issues.apache.org/jira/browse/MAPREDUCE-3246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13140225#comment-13140225
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Hadoop QA commented on MAPREDUCE-3246:
--------------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12501619/MAPREDUCE-3246-extensible-task.patch
against trunk revision .
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 2 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
-1 javac. The applied patch generated 1712 javac compiler warnings (more
than the trunk's current 1706 warnings).
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed unit tests in .
+1 contrib tests. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1221//testReport/
Console output:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1221//console
This message is automatically generated.
> Make Task extensible to support modifications of Task or even alternate
> programming paradigms
> ---------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-3246
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3246
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: task
> Affects Versions: 0.23.0
> Reporter: Binglin Chang
> Assignee: Binglin Chang
> Attachments: MAPREDUCE-3246-extensible-task.patch
>
>
> One of MRv2's goal is to support alternate programming paradigms, but
> building a application using YARN from the bottom is not trivial. In fact
> most component of MapReduce can be reused, mostly the scheduler/master side,
> and we can make changes/extensions only on the task/slave side, such as
> native tasks, hash-aggregation style combiner/reducer interfaces.
> The first thing to do I think is to make task/slave side extensible, more
> specific, the Task in JvmTask should serialized with class name, not simply a
> boolean isMap, and make task class name configurable in JobConf, there maybe
> other minor changes. By doing so, developers can at least extends their own
> MapTask/ReduceTask.
> I just post my initial thoughts here for opinions. If this change is OK, I
> can submit a patch, this is just a trivial work.
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