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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, 2016-01-25, 06:02
[expand - 1 more] - Re: [UPDATE] New ASF git policy on force-pushes / Tags / Stale branches - MapReduce - [mail # dev]
...+1 on all counts.One thing that wasn't clear from the INFRA announcement: are trunk,branch-* branches protected against force-pushes in the new world? If not,should we ask them to be locked ...
   Author: Karthik Kambatla, 2016-01-17, 22:33
[MAPREDUCE-5718] MR job will fail after commit fail - MapReduce - [issue]
...when any of this happens: While testing RM HA, if the RM fails over while an MR AM is in the middle of a commit, When testing preempting, if the MR AM fails over during the middle of a commi...
http://issues.apache.org/jira/browse/MAPREDUCE-5718    Author: Karthik Kambatla, 2016-01-11, 17:38
[expand - 1 more] - Re: [DISCUSS] Looking to a 2.8.0 release - MapReduce - [mail # dev]
...I am really against the notion of calling x.y.0 releases alpha/beta; it isvery confusing. If we think a release is alpha/beta quality, why notrelease it as x.y.0-alpha or x.y.0-beta, and fol...
   Author: Karthik Kambatla, 2015-11-12, 17:05
[MAPREDUCE-6506] Make the reducer-preemption configs consistent in how they handle defaults - MapReduce - [issue]
http://issues.apache.org/jira/browse/MAPREDUCE-6506    Author: Karthik Kambatla, 2015-10-08, 23:24
[MAPREDUCE-6501] Improve reducer preemption - MapReduce - [issue]
...As discussed on MAPREDUCE-6302, we could improve the reducer preemption as follows: preempt enough reducers so there are enough mappers to match slowstart prioritize preempting reducers that...
http://issues.apache.org/jira/browse/MAPREDUCE-6501    Author: Karthik Kambatla, 2015-10-05, 07:00
Scaling JHS - MapReduce - [mail # dev]
...Hi folksJust wanted to bring this up and see what people think.IIUC, JHS memory consumption depends on the number of jobs, tasks per job,and concurrent accesses. There might be a few orthogo...
   Author: Karthik Kambatla, 2015-09-02, 18:17
Re: IMPORTANT: automatic changelog creation - MapReduce - [mail # dev]
...Huge +1On Thursday, July 2, 2015, Chris Nauroth  wrote:Mobile ...
   Author: Karthik Kambatla, 2015-07-03, 03:02
[MAPREDUCE-6409] NM restarts could lead to app failures - MapReduce - [issue]
...Consider the following scenario:1. RM assigns a container on node N to an app A.2. Node N is restarted3. A tries to launch container on node N.3 could lead to an NMNotYetReadyException depen...
http://issues.apache.org/jira/browse/MAPREDUCE-6409    Author: Karthik Kambatla, 2015-06-21, 16:14
[MAPREDUCE-6369] MR compile shouldn't depend on nodemanager - MapReduce - [issue]
...Dependency analysis shows MR depends on nodemanager. If possible, MR shouldn't depend on any yarn-server APIs at all. This might require some changes in Yarn....
http://issues.apache.org/jira/browse/MAPREDUCE-6369    Author: Karthik Kambatla, 2015-05-20, 03:18
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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