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[MAPREDUCE-5222] Fix JobClient incompatibilities with MR1 - MapReduce - [issue]
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...JobClient is missing the following two public methods we need to add for binary compatibility: static isJobDirValid(Path, FileSystem) Path getStagingAreaDir()...
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http://issues.apache.org/jira/browse/MAPREDUCE-5222
Author: Karthik Kambatla,
2013-05-14, 15:06
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[MAPREDUCE-5214] Compatibility: Add a deprecated MRAdmin that wraps around RMAdmin - MapReduce - [issue]
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...MRAdmin doesn't apply to MR2. However, to maintain compatibility against 1.x releases, it might be a good idea to add a deprecated version of MRAdmin that wraps around RMAdmin, prints out a ...
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http://issues.apache.org/jira/browse/MAPREDUCE-5214
Author: Karthik Kambatla,
2013-05-13, 23:42
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[MAPREDUCE-5218] Annotate (comment) internal classes as Private - MapReduce - [issue]
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...The following classes are intended for internal use and it would be nice to explicitly state that in comments/annotation. TaskUmbilicalProtocol TaskInProgress MapReducePolicyProvider MRAdmin...
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http://issues.apache.org/jira/browse/MAPREDUCE-5218
Author: Karthik Kambatla,
2013-05-09, 22:23
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Re: JVM vs container memory configs - MapReduce - [mail # dev]
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...Thanks a lot for your inputs, Bobby and Harsh. Harsh - Agree that we should raise the heap sizes, particularly for your second reason. Once we arrive at a good default value, I t...
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Author: Karthik Kambatla,
2013-05-06, 16:59
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[MAPREDUCE-5207] Add mapreduce.{map|reduce}.memory.mb defaults to mapred-default.xml - MapReduce - [issue]
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...mapred-default.xml is missing defaults for mapredue.{map|reduce}.memory.mb...
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http://issues.apache.org/jira/browse/MAPREDUCE-5207
Author: Karthik Kambatla,
2013-05-03, 18:01
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JVM vs container memory configs - MapReduce - [mail # dev]
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...Hi While looking into MAPREDUCE-5207 (adding defaults for mapreduce.{map|reduce}.memory.mb), I was wondering how much headroom should be left on top of mapred.child.java.opts (or other...
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Author: Karthik Kambatla,
2013-05-03, 16:20
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Re: Cannot find JobTracker and TaskTracker classes in Hadoop 2.0.2-alpha - MapReduce - [mail # dev]
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...Hi Thoihen Hadoop 2.x (and 0.23.x) releases have MapReduce running on YARN, which operates on the ResourceManager/NodeManager architecture and not JobTracker/TaskTracker. Hadoop ...
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Author: Karthik Kambatla,
2013-04-26, 18:28
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Re: Why number of reducers should be less than number of reducer slots. - MapReduce - [mail # dev]
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...I wonder how accurate that is. However, by setting the number of reducers slightly lesser than the reduce slots, the difference acts as headroom for speculative reduce tasks. And, the ...
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Author: Karthik Kambatla,
2013-04-23, 06:33
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[MAPREDUCE-5110] Kill task early in case of long task launch delays - MapReduce - [issue]
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...If a task takes too long to launch, the JT expires the task and schedules another attempt. The earlier attempt can start after the later attempt leading to two parallel attempts running at t...
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http://issues.apache.org/jira/browse/MAPREDUCE-5110
Author: Karthik Kambatla,
2013-04-18, 01:44
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[MAPREDUCE-5098] Fix findbugs warnings in gridmix - MapReduce - [issue]
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...Work on MAPREDUCE-5077 has exposed a bunch of findbugs warnings in gridmix code. https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3459//artifact/trunk/patchprocess/newPatchFindbugsWar...
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http://issues.apache.org/jira/browse/MAPREDUCE-5098
Author: Karthik Kambatla,
2013-04-11, 14:09
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