[jira] [Created] (MAPREDUCE-3246) Make Task extensible to support modifications of Task or even alternate programming paradigms

["Binglin Chang (Created) (JIRA)" <ji...@apache.org>]

Make Task extensible to support modifications of Task or even alternate programming paradigms
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                 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


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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