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[MAPREDUCE-4394] ReduceTask.MapOutputCopier.copyOutput() signature doesn't match the corresponding Javadoc - MapReduce - [issue]
http://issues.apache.org/jira/browse/MAPREDUCE-4394    Author: Karthik Kambatla, 2013-05-30, 17:20
Re: [VOTE] Plan to create release candidate for 0.23.8 - MapReduce - [mail # dev]
...+1 (non-binding)   On Mon, May 20, 2013 at 11:13 AM, Siddharth Seth wrote:  ...
   Author: Karthik Kambatla, 2013-05-20, 19:49
[MAPREDUCE-4806] Cleanup: Some (5) private methods in JobTracker.RecoveryManager are not used anymore after MAPREDUCE-3837 - MapReduce - [issue]
...MAPREDUCE-3837 re-organized the job recovery code, moving out the code that was using the methods in RecoveryManager.Now, the following methods in {{JobTracker.RecoveryManager}}seem to be un...
http://issues.apache.org/jira/browse/MAPREDUCE-4806    Author: Karthik Kambatla, 2013-05-15, 06:16
[MAPREDUCE-4595] TestLostTracker failing - possibly due to a race in JobHistory.JobHistoryFilesManager#run() - MapReduce - [issue]
...The source for occasional failure of TestLostTracker seems like the following:On job completion, JobHistoryFilesManager#run() spawns another thread to move history files to done folder. Test...
http://issues.apache.org/jira/browse/MAPREDUCE-4595    Author: Karthik Kambatla, 2013-05-15, 06:16
[MAPREDUCE-5214] Compatibility: Add a deprecated MRAdmin that wraps around RMAdmin - MapReduce - [issue]
...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 ...
http://issues.apache.org/jira/browse/MAPREDUCE-5214    Author: Karthik Kambatla, 2013-05-13, 23:42
[MAPREDUCE-5218] Annotate (comment) internal classes as Private - MapReduce - [issue]
...The following classes are intended for internal use and it would be nice to explicitly state that in comments/annotation. TaskUmbilicalProtocol TaskInProgress MapReducePolicyProvider MRAdmin...
http://issues.apache.org/jira/browse/MAPREDUCE-5218    Author: Karthik Kambatla, 2013-05-09, 22:23
[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
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
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB