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[MAPREDUCE-5036] Default shuffle handler port should not be 8080 - MapReduce - [issue]
...The shuffle handler port (mapreduce.shuffle.port) defaults to 8080.  This is a pretty common port for web services, and is likely to cause unnecessary port conflicts....
http://issues.apache.org/jira/browse/MAPREDUCE-5036    Author: Sandy Ryza, 2014-02-24, 20:40
[MAPREDUCE-5763] Warn message about httpshuffle in NM logs - MapReduce - [issue]
...2014-02-20 12:08:45,141 WARN org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices: The Auxilurary Service named 'mapreduce_shuffle' in the configuration is for class class ...
http://issues.apache.org/jira/browse/MAPREDUCE-5763    Author: Sandy Ryza, 2014-02-23, 04:21
Re: [VOTE] Release Apache Hadoop 2.3.0 - MapReduce - [mail # dev]
...+1 (non-binding)Built from source and ran jobs on a pseudo-distributed cluster with theFair SchedulerOn Wed, Feb 12, 2014 at 7:56 PM, Xuan Gong  wrote: ...
   Author: Sandy Ryza, 2014-02-13, 21:07
Re: The code for the Shuffle phase of MapReduce - MapReduce - [mail # dev]
...Hi Pramod,For the reduce side, also check out Shuffle.java.-SandyOn Mon, Feb 10, 2014 at 2:54 AM, Pramod Biligiriwrote: ...
   Author: Sandy Ryza, 2014-02-10, 21:40
Re: Re-swizzle 2.3 - MapReduce - [mail # dev]
...+1 to reverting those JIRAs from branch-2.3.  As YARN-1689 is fixing aproblem caused by YARN-1493 I think we can revert it in branch-2.3 as well.I think we should leave them in branch-2...
   Author: Sandy Ryza, 2014-02-07, 01:15
[MAPREDUCE-5732] Report proper queue when job has been automatically placed - MapReduce - [issue]
...Some schedulers, such as the Fair Scheduler, provide the ability to automatically place an application into a queue based on attributes such as the user and group of the submitter.  In ...
http://issues.apache.org/jira/browse/MAPREDUCE-5732    Author: Sandy Ryza, 2014-01-31, 13:39
[MAPREDUCE-5596] Allow configuring the number of threads used to serve shuffle connections - MapReduce - [issue]
...MR1 had mapreduce.tasktracker.http.threads.  MR2 always uses the Netty default 2 * Runtime.availableProcessors().  We should make this configurable....
http://issues.apache.org/jira/browse/MAPREDUCE-5596    Author: Sandy Ryza, 2014-01-28, 23:33
[MAPREDUCE-5725] TestNetworkedJob relies on the Capacity Scheduler - MapReduce - [issue]
...We should either make this explicit or make it scheduler-agnostic....
http://issues.apache.org/jira/browse/MAPREDUCE-5725    Author: Sandy Ryza, 2014-01-28, 23:33
[MAPREDUCE-5601] ShuffleHandler fadvises file regions as DONTNEED even when fetch fails - MapReduce - [issue]
...When a reducer initiates a fetch request, it does not know whether it will be able to fit the fetched data in memory.  The first part of the response tells how much data will be coming....
http://issues.apache.org/jira/browse/MAPREDUCE-5601    Author: Sandy Ryza, 2014-01-28, 23:33
Re: Doubt in Yarn Scheduler. - MapReduce - [mail # dev]
...Hi Suresh,The schedulers used in MR1 are not compatible with the schedulers used inMR2 / YARN.  Check out ResourceScheduler.java for the updated interface.I believe that speculative exe...
   Author: Sandy Ryza, 2014-01-27, 22:17
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