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[expand - 1 more] - Re: JVM vs container memory configs - MapReduce - [mail # dev]
...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...
   Author: Karthik Kambatla, 2013-05-06, 16:59
[MAPREDUCE-5207] Add mapreduce.{map|reduce}.memory.mb defaults to mapred-default.xml - MapReduce - [issue]
...mapred-default.xml is missing defaults for mapredue.{map|reduce}.memory.mb...
http://issues.apache.org/jira/browse/MAPREDUCE-5207    Author: Karthik Kambatla, 2013-05-03, 18:01
Re: Cannot find JobTracker and TaskTracker classes in Hadoop 2.0.2-alpha - MapReduce - [mail # dev]
...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 ...
   Author: Karthik Kambatla, 2013-04-26, 18:28
Re: Why number of reducers should be less than number of reducer slots. - MapReduce - [mail # dev]
...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 ...
   Author: Karthik Kambatla, 2013-04-23, 06:33
[MAPREDUCE-5098] Fix findbugs warnings in gridmix - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-5098    Author: Karthik Kambatla, 2013-04-11, 14:09
[MAPREDUCE-4643] Make job-history cleanup-period configurable - MapReduce - [issue]
...Job history cleanup should be made configurable. Currently, it is set to 1 month by default. The DEBUG_MODE (to be removed, see MAPREDUCE-4629) sets it to 20 minutes, but it should be config...
http://issues.apache.org/jira/browse/MAPREDUCE-4643    Author: Karthik Kambatla, 2013-04-08, 19:51
[MAPREDUCE-5077] Cleanup: mapreduce.util.ResourceCalculatorPlugin and related code should be removed - MapReduce - [issue]
...ResourceCalculatorPlugin and ProcfsBasedProcessTree have moved to yarn.util and the mapreduce.util versions don't seem to be used anymore. Should remove related code....
http://issues.apache.org/jira/browse/MAPREDUCE-5077    Author: Karthik Kambatla, 2013-03-27, 14:06
[MAPREDUCE-5099] mapreduce.lib.jobcontrol.JobControl API Incompatibility between branch-1 and branch-2 - MapReduce - [issue]
...The branch-1 API has the following methods:public java.util.ArrayList getWaitingJobList();public java.util.ArrayList getRunningJobList();public java.util.ArrayList getReadyJobsList();public ...
http://issues.apache.org/jira/browse/MAPREDUCE-5099    Author: Karthik Kambatla, 2013-03-23, 04:14
[MAPREDUCE-4990] Construct debug strings conditionally in ShuffleHandler.Shuffle#sendMapOutput() - MapReduce - [issue]
...In #sendMapOutput(), the debug statements are not wrapped in the customary #isDebugEnabled() condition. Given this piece of code is critical for performance, it would be nice to fix it....
http://issues.apache.org/jira/browse/MAPREDUCE-4990    Author: Karthik Kambatla, 2013-03-20, 12:50
[MAPREDUCE-5005] TestProcfsProcessTree#testProcessTree() doesn't wait long enough for the process to die - MapReduce - [issue]
...TestProcfsProcessTree#testProcessTree fails occasionally with the following stack traceStack Trace:junit.framework.AssertionFailedError: expected:<false> but was:<true>        at...
http://issues.apache.org/jira/browse/MAPREDUCE-5005    Author: Karthik Kambatla, 2013-03-12, 02:38
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