The code that runs in the child task process.

Issues: Unresolved

Key Summary Due Date
Bug MAPREDUCE-6214 MultipleOutputs output folders are not deleted when a task fails
Bug MAPREDUCE-956 Shuffle should be broken down to only two phases (copy/reduce) instead of three (copy/sort/reduce)
Improvement MAPREDUCE-1046 Remove mapred.{map|reduce}.child.ulimit and use mapred.job.{map|reduce}.memory.mb as the task's ulimit value

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Issues: Updated recently

Key Summary Updated
New Feature MAPREDUCE-1211 Online aggregation and continuous query support
Bug MAPREDUCE-6793 io.sort.factor code default and mapred-default.xml values inconsistent
Bug MAPREDUCE-6002 MR task should prevent report error to AM when process is shutting down

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Versions: Unreleased

Name Release date
Unreleased MR-3902  
Unreleased MR-2454  
Unreleased 1.3.0  
Unreleased 2.4.0
Unreleased fs-encryption  
Unreleased 2.8.0  
Unreleased YARN-2928  
Unreleased 2.9.0  
Unreleased 2.7.4  
Unreleased MAPREDUCE-6608  
Unreleased 3.0.0-alpha2  
Unreleased 2.8.1  
Unreleased 2.6.6  
Unreleased 3.0.0-beta1  
Unreleased MR-6749  

...and 11 more

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