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[MAPREDUCE-1690] Using BuddySystem to reduce the ReduceTask's mem usage in the step of shuffle - MapReduce - [issue]
...      When the reduce task launched, it will start several MapOutputCopier threads to download the output from finished map, every thread is a MapOutputCopier thread running i...
http://issues.apache.org/jira/browse/MAPREDUCE-1690    Author: luoli, 2014-07-30, 18:40
[MAPREDUCE-1682] Tasks should not be scheduled after tip is killed/failed. - MapReduce - [issue]
...We have seen the following scenario in our cluster:A job got marked failed, because four attempts of a TIP failed. This would kill all the map and reduce tips. Then a job-cleanup attempt is ...
http://issues.apache.org/jira/browse/MAPREDUCE-1682    Author: Amareshwari Sriramadasu, 2014-07-30, 18:31
[MAPREDUCE-1681] MapReduce API compatibility - MapReduce - [issue]
...This is an umbrella issue to document and test MapReduce API compatibility across releases....
http://issues.apache.org/jira/browse/MAPREDUCE-1681    Author: Tom White, 2014-07-30, 18:30
[MAPREDUCE-2594] [Gridmix] Improve the way Gridmix communicates specifications to map/reduce tasks - MapReduce - [issue]
...As of now, Gridmix ships map task's specifications within job splits and reduce task's specification within the map's output (as the first key). This not only makes the Gridmix code harder t...
http://issues.apache.org/jira/browse/MAPREDUCE-2594    Author: Amar Kamat, 2014-07-30, 18:27
[MAPREDUCE-1675] SleepJob hacks GridmixKey to pass along the sleep duration from map tasks to reduce tasks. - MapReduce - [issue]
...SleepJob hacks GridmixKey to pass along the sleep duration from map tasks to reduce tasks. We need to come up with cleaner solution...
http://issues.apache.org/jira/browse/MAPREDUCE-1675    Author: rahul k singh, 2014-07-30, 18:27
[MAPREDUCE-1674] Some new features for CapacityTaskScheduler - MapReduce - [issue]
...Some new features for CapacityTaskScheduler developed at Baidu....
http://issues.apache.org/jira/browse/MAPREDUCE-1674    Author: Kang Xiao, 2014-07-30, 18:27
[MAPREDUCE-1648] Use rolling to limit tasklogs - MapReduce - [issue]
...There are at least two types of task-logs: syslog and stdlogTask-Jvm outputs syslog by log4j with TaskLogAppender, TaskLogAppender looks just like "tail -c", it stores last N byte/line logs ...
http://issues.apache.org/jira/browse/MAPREDUCE-1648    Author: Guilin Sun, 2014-07-30, 18:22
[MAPREDUCE-1645] Task cleanup attempt details should also be logged to JobHistory - MapReduce - [issue]
...Currently, Task cleanup attempt details are not logged to JobHistory. JobHistory should log at least where the task cleanup attempt ran....
http://issues.apache.org/jira/browse/MAPREDUCE-1645    Author: Amareshwari Sriramadasu, 2014-07-30, 18:20
[MAPREDUCE-1642] Many hudson test failures because of ZipException - MapReduce - [issue]
...Nowadays, many hudson patch builds fail because of ZipException.One such failure @http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/67/testReport/org.apache.had...
http://issues.apache.org/jira/browse/MAPREDUCE-1642    Author: Amareshwari Sriramadasu, 2014-07-30, 18:19
[MAPREDUCE-1640] Node health feature fails to blacklist a node if the health check script times out in some cases - MapReduce - [issue]
...Node health check feature fails to blacklist a TT if health check script times out. Below are the values that were set: mapred.healthChecker.interval=60000 mapred.healthChecker.script.timeou...
http://issues.apache.org/jira/browse/MAPREDUCE-1640    Author: Vinod Kumar Vavilapalli, 2014-07-30, 18:19
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