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[MAPREDUCE-2384] The job submitter should make sure to validate jobs before creation of necessary files - MapReduce - [issue]
...In 0.20.x/1.x, 0.21, 0.22 the MapReduce job submitter writes some job-necessary files to the JT FS before checking for output specs or other job validation items. This appears unnecessary to...
http://issues.apache.org/jira/browse/MAPREDUCE-2384    Author: Denny Ye, 2013-09-23, 12:42
[MAPREDUCE-2393] No total min share limitation of all pools - MapReduce - [issue]
...hi, there is no limitation about min share of all pools with cluster total shares. User can define arbitrary amount of min share for each pool. It has such description in <fair scheduler ...
http://issues.apache.org/jira/browse/MAPREDUCE-2393    Author: Denny Ye, 2012-12-02, 22:44
[MAPREDUCE-3362] Job always stay at 'Pending' status and cannot finish several days - MapReduce - [issue]
...Our jobs are always keeping at 'pending' status several days. We checked jobtracker log and found that one task(attemp) failed due to failure to store job history to HDFS. The issue begins f...
http://issues.apache.org/jira/browse/MAPREDUCE-3362    Author: Denny Ye, 2011-12-13, 08:24
Re: define a specific data node from a reduce task. - MapReduce - [mail # user]
...Each reduce task take the role of DFS client by using specified output folder. The placement of reduce output result judged by NameNode block placement policy. One thing I can confirm, as th...
   Author: Denny Ye, 2011-06-29, 06:48
[MAPREDUCE-2401] Can not change scheduling mode of default pool - MapReduce - [issue]
...hi gays   When client submitted a job, Fair Scheduler chose default pool (by mapreduce.job.user.name) if client undefined property 'mapred.fairscheduler.pool'. This default pool's ...
http://issues.apache.org/jira/browse/MAPREDUCE-2401    Author: Denny Ye, 2011-05-17, 08:07
[MAPREDUCE-2402] Dump scheduling detail if any jobs are running - MapReduce - [issue]
...Currently, fair scheduler dumps scheduling detail to local log file, and it always doing continually regardless system is idle. Log file will be larger along. In my opinion, I only want the ...
http://issues.apache.org/jira/browse/MAPREDUCE-2402    Author: Denny Ye, 2011-03-23, 09:02
Re: Developing on MAPREDUCE-279 - MapReduce - [mail # dev]
...hi Arun,     I would like to join into *Scheduler* development or some cases related with it .     Is there have any documents about *Scheduler* in new MR architecture? t...
   Author: Denny Ye, 2011-03-22, 04:22
Re: set number of map tasks in GridMix2 - MapReduce - [mail # user]
...hi Pedro,       You are right, the number of map tasks is defined by the number of input splits. In default, one DFS block       one split. In your first exampl...
   Author: Denny Ye, 2011-03-19, 02:02
Re: Split Location. - MapReduce - [mail # dev]
...On Thu, Mar 17, 2011 at 3:57 AM, Jane Chen  wrote:  JobInProgress#failMap(TaskInProgress). It adds all the locations with input split to map cache and expect to run with high prior...
   Author: Denny Ye, 2011-03-17, 01:32
[MAPREDUCE-2385] All test cases failed in TestFairScheduler - MapReduce - [issue]
...All test cases failed due to there is no #canBeSpeculated(long) method at inner class FakeTaskInProgress. Each case may call the #update() method in FairScheduler, using #canBeSpeculated(lon...
http://issues.apache.org/jira/browse/MAPREDUCE-2385    Author: Denny Ye, 2011-03-15, 07:28
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