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[MAPREDUCE-5420] Remove mapreduce.task.tmp.dir from mapred-default.xml - MapReduce - [issue]
...mapreduce.task.tmp.dir no longer has any effect, so it should no longer be documented in mapred-default.  (There is no YARN equivalent for the property.  It now is just always ./tm...
http://issues.apache.org/jira/browse/MAPREDUCE-5420    Author: Sandy Ryza, 2013-08-02, 18:48
[MAPREDUCE-5130] Add missing job config options to mapred-default.xml - MapReduce - [issue]
...I came across that mapreduce.map.java.opts and mapreduce.reduce.java.opts were missing in mapred-default.xml.  I'll do a fuller sweep to see what else is missing before posting a patch....
http://issues.apache.org/jira/browse/MAPREDUCE-5130    Author: Sandy Ryza, 2013-08-01, 01:42
[MAPREDUCE-5403] MR changes to accommodate yarn.application.classpath being moved to the server-side - MapReduce - [issue]
...yarn.application.classpath is a confusing property because it is used by MapReduce and not YARN, and MapReduce already has mapreduce.application.classpath, which provides the same functional...
http://issues.apache.org/jira/browse/MAPREDUCE-5403    Author: Sandy Ryza, 2013-07-25, 21:10
[MAPREDUCE-5363] Fix doc and spelling for TaskCompletionEvent#getTaskStatus and getStatus - MapReduce - [issue]
...The doc for TaskCompletionEvent#get(Task)Status in both MR1 and MR2 isReturns enum Status.SUCESS or Status.FAILURE.@return task tracker statusThe actual values that the Status enum can take ...
http://issues.apache.org/jira/browse/MAPREDUCE-5363    Author: Sandy Ryza, 2013-07-23, 07:40
[MAPREDUCE-5382] LocalJobRunner should use default FS for system and staging dirs by default - MapReduce - [issue]
...For local jobs, staging dirs and system dirs are currently required to be placed on the local FS. I am continually bitten by permissions errors when I set mapreduce.jobtracker.staging.root.d...
http://issues.apache.org/jira/browse/MAPREDUCE-5382    Author: Sandy Ryza, 2013-07-11, 19:45
Re: Fair Scheduler pools regardless of users - MapReduce - [mail # user]
...Hi Amit,  You can set the mapred.job.queue.name to the name of the queue you want to submit it to.  If the queue does not exist, it will be created.  If you want to configure ...
   Author: Sandy Ryza, 2013-07-08, 22:11
Re: Containers and CPU - MapReduce - [mail # user]
...CPU limits are only enforced if cgroups is turned on.  With cgroups on, they are only limited when there is contention, in which case tasks are given CPU time in proportion to the numbe...
   Author: Sandy Ryza, 2013-07-02, 17:56
[MAPREDUCE-5365] Set mapreduce.job.classloader to true by default - MapReduce - [issue]
...MAPREDUCE-1700 introduced the mapreduce.job.classpath option, which uses a custom classloader to separate system classes from user classes.  It seems like there are only rare cases when...
http://issues.apache.org/jira/browse/MAPREDUCE-5365    Author: Sandy Ryza, 2013-07-02, 07:51
Re: How to Free-up a Map Slot without Killing the Entire Job? - MapReduce - [mail # dev]
...The fair scheduler does preemption as well.  -Sandy   On Sat, Jun 29, 2013 at 12:05 PM, Steve Loughran wrote:  ...
   Author: Sandy Ryza, 2013-06-29, 20:46
Re: Yarn job stuck with no application master being assigned - MapReduce - [mail # user]
...I'm not sure of any consequences for setting a higher value.  You probably only need more than 1GB for very large jobs with 1000s of tasks.   On Fri, Jun 21, 2013 at 6:07 PM, Siddh...
   Author: Sandy Ryza, 2013-06-22, 01:18
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