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[MAPREDUCE-145] DiskChecker$DiskErrorException when 'reduce > reduce' - MapReduce - [issue]
...We have  9900 maptasks and 60 reducetasks in the job. When all the other 59 reducetasks have finished, the last reducetask runs so slow and finally finished after throwing out a lot of ...
http://issues.apache.org/jira/browse/MAPREDUCE-145    Author: Leitao Guo, 2014-07-21, 23:03
[MAPREDUCE-435] JobTracker might not accept first few jobs if restarted immediately - MapReduce - [issue]
...If the jobtracker is restarted in a very short span of time (e.g. test case). First few submissions might fail as the jobtracker identifier remains same new jobid given by JobTracker.getNewJ...
http://issues.apache.org/jira/browse/MAPREDUCE-435    Author: Amar Kamat, 2014-07-21, 23:01
[MAPREDUCE-411] Inconsistent strings for job and queue related scheduling information in UI when the information is not available. - MapReduce - [issue]
...HADOOP-3930 added support for displaying queue related and job related scheduling information. When this information is not available, it is displayed as 'N/A' in some cases and 'NA' in some...
http://issues.apache.org/jira/browse/MAPREDUCE-411    Author: Hemanth Yamijala, 2014-07-21, 22:55
[MAPREDUCE-330] Log information regarding changes to job in jobtracker - MapReduce - [issue]
...Some actions like changing the priority of a job, killing a job, killing a task may need to be tracked for admin purposes. It would be good to, at a minimum, log these at an INFO level in th...
http://issues.apache.org/jira/browse/MAPREDUCE-330    Author: Hemanth Yamijala, 2014-07-21, 22:54
[MAPREDUCE-194] Split Information errors when input data volumn is trivial - MapReduce - [issue]
...The mapreduce input is a text file with only 8 lines ( filepath: /in_wc/pretty ), and we set "conf.setNumMapTasks(8)"  in the program. I thought there will generate 8 maptasks, but actu...
http://issues.apache.org/jira/browse/MAPREDUCE-194    Author: Leitao Guo, 2014-07-21, 22:54
[MAPREDUCE-246] Job recovery should fail or kill a job that fails ACL checks upon restart, if the job was running previously - MapReduce - [issue]
...Consider a scenario where a job was submitted to the M/R system and runs for a while. Then say the JT is restarted, and before that the ACLs for the user are changed so that that user can no...
http://issues.apache.org/jira/browse/MAPREDUCE-246    Author: Hemanth Yamijala, 2014-07-21, 22:49
[MAPREDUCE-650] Add atomic move option - MapReduce - [issue]
...Provide support for update to move directories/files atomically by copying the src directory to a tmp directory (with random/unique name) then move the directory to its target destination na...
http://issues.apache.org/jira/browse/MAPREDUCE-650    Author: Richard Theige, 2014-07-21, 22:48
[MAPREDUCE-652] Logging turned on by default while using distcp - MapReduce - [issue]
...Distcp should have an option to disable logging during a distcpeg: hadoop distcp --nolog <source dir> <destination dir>By default logging is enabled or turned on while using dist...
http://issues.apache.org/jira/browse/MAPREDUCE-652    Author: Sanjeev Jaiswal, 2014-07-21, 22:47
[MAPREDUCE-219] JT should remember blacklisted TT after restart - MapReduce - [issue]
...Currently, when JT is restarted , it does not remember any TT(s) which was blacklisted across the cluster before the restart. It would be useful if a new feature could be added for JT to rem...
http://issues.apache.org/jira/browse/MAPREDUCE-219    Author: Ramya Sunil, 2014-07-21, 22:36
[MAPREDUCE-399] Duplicate destroy of process trees in TaskMemoryManager. - MapReduce - [issue]
...TaskMemoryManager currently works only on Linux and terminates tasks that transgress memory-limits by first calling TaskTracker.purgeTask() and then explicitly destroying the process tree to...
http://issues.apache.org/jira/browse/MAPREDUCE-399    Author: Vinod Kumar Vavilapalli, 2014-07-21, 22:34
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