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[MAPREDUCE-853] Support a hierarchy of queues in the Map/Reduce framework - MapReduce - [issue]
...In MAPREDUCE-824, we proposed introducing a hierarchy of queues in the capacity scheduler. Currently, the M/R framework provides the notion of job queues and handles some functionality relat...
http://issues.apache.org/jira/browse/MAPREDUCE-853    Author: Hemanth Yamijala, 2010-08-24, 21:15
[MAPREDUCE-771] Setup and cleanup tasks remain in UNASSIGNED state for a long time on tasktrackers with long running high RAM tasks - MapReduce - [issue]
...When a high RAM job's task is scheduled on a tasktracker, the number of slots it occupies will be more than one. If enough such tasks are scheduled, there can come a situation when there are...
http://issues.apache.org/jira/browse/MAPREDUCE-771    Author: Hemanth Yamijala, 2010-08-24, 21:14
[MAPREDUCE-682] Reserved tasktrackers should be removed when a node is globally blacklisted - MapReduce - [issue]
...When support was added to reserve tasktrackers for high RAM jobs per MAPREDUCE-516, we missed removing reservations on tasktrackers that are globally blacklisted. This is not a major concern...
http://issues.apache.org/jira/browse/MAPREDUCE-682    Author: Hemanth Yamijala, 2010-08-24, 21:14
[MAPREDUCE-522] Rewrite TestQueueCapacities to make it simpler and avoid timeout errors - MapReduce - [issue]
...We have seen TestQueueCapacities fail periodically and there have been a couple of times fixes partially fixed the problem, the most recent instance being HADOOP-5869. I found another instan...
http://issues.apache.org/jira/browse/MAPREDUCE-522    Author: Hemanth Yamijala, 2010-08-24, 21:13
[MAPREDUCE-467] Collect information about number of tasks succeeded / total per time unit for a tasktracker. - MapReduce - [issue]
...Collecting information of number of tasks succeeded / total per tasktracker and being able to see these counts per hour, day and since start time will help reason about things like the black...
http://issues.apache.org/jira/browse/MAPREDUCE-467    Author: Hemanth Yamijala, 2010-08-24, 21:13
Re: Profiling Hadoop Map Reduce with the 20.2 API - MapReduce - [mail # user]
...David,    Is  Forrest documentation for MapReduce (http://hadoop.apache.org/common/docs/r0.20.0/mapred_tutorial.html) should be updated. I do see there is mention of these configur...
   Author: Hemanth Yamijala, 2010-08-17, 06:19
Re: What's speculative tasks - MapReduce - [mail # user]
...Pedro,  On Sun, Jul 25, 2010 at 7:33 PM, Pedro Costa  wrote:  When the MR framework detects that some tasks are running slower than others in the job, it has an option to laun...
   Author: Hemanth Yamijala, 2010-07-26, 04:21
[MAPREDUCE-591] TestStreamingStderr fails occassionally - MapReduce - [issue]
...TestStreamingStderr fails occassionally with a timeout on trunk....
http://issues.apache.org/jira/browse/MAPREDUCE-591    Author: Hemanth Yamijala, 2010-07-06, 10:44
Re: Shuffle Error: Exceeded MAX_FAILED_UNIQUE_FETCHES; bailing-out. - MapReduce - [mail # user]
...Hi,  Sorry, I couldn't take a close look at the logs until now. Unfortunately, I could not see any huge difference between the success and failure case. Can you please check if things l...
   Author: Hemanth Yamijala, 2010-07-06, 08:34
Re: Partition - Distribution of map outputs - MapReduce - [mail # user]
...Pedro,  On Thu, Jul 1, 2010 at 3:37 AM, Pedro Costa  wrote:  The number of mappers created will depend on the number of 'InputSplits' generated for the program inputs. How to ...
   Author: Hemanth Yamijala, 2010-07-01, 02:37
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