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[MAPREDUCE-5481] Enable uber jobs to have multiple reducers
...TestUberAM has been timing out on trunk for some time now and surefire then fails the build. I'm not able to reproduce it locally, but the Jenkins builds have been seeing it fairly con...
, 2014-07-01, 00:10
[MAPREDUCE-5830] HostUtil.getTaskLogUrl is not backwards binary compatible with 2.3
...HostUtil.getTaskLogUrl used to have a signature like this in Hadoop 2.3.0 and earlier:public static String getTaskLogUrl(String taskTrackerHostName, String httpPort, String taskAttemptID)but...
, 2014-06-30, 09:18
[MAPREDUCE-5758] Reducer local data is not deleted until job completes
...Ran into an instance where a reducer shuffled a large amount of data and subsequently failed, but the local data is not purged when the task fails but only after the entire job completes. &n...
, 2014-05-20, 20:19
[MAPREDUCE-4816] JobImpl Invalid event: JOB_TASK_ATTEMPT_COMPLETED at FAILED
...Saw this in an AM log of a task that had failed:2012-11-21 23:26:44,533 ERROR [AsyncDispatcher event handler] org.apache.hadoop.mapreduce.v2.app.job.impl.JobImpl: Can't handle this event at ...
, 2014-04-23, 21:04
[MAPREDUCE-4852] Reducer should not signal fetch failures for disk errors on the reducer's side
...Ran across a case where a reducer ran on a node where the disks were full, leading to an exception like this during the shuffle fetch:2012-12-05 09:07:28,749 INFO [fetcher#25] org.apache.had...
, 2014-04-23, 20:03
[MAPREDUCE-5603] Ability to disable FileInputFormat listLocatedStatus optimization to save client memory
...It would be nice if users had the option to disable the listLocatedStatus optimization in FileInputFormat to save client memory....
, 2014-04-22, 18:34
[MAPREDUCE-4283] Display tail of aggregated logs by default
...Similar to the manner in which the nodemanager webUI displays container logs, it would be very useful if the historyserver showed the trailing 4K or so of the aggregated logs with a link to ...
, 2014-04-21, 19:17
[MAPREDUCE-4937] MR AM handles an oversized split metainfo file poorly
...When an job runs with a split metainfo file that's larger than it has been configured to handle then it just crashes. This leaves the user with a less-than-ideal debug session since th...
, 2014-04-20, 15:09
[MAPREDUCE-5570] Map task attempt with fetch failure has incorrect attempt finish time
...If a map task attempt is retroactively failed due to excessive fetch failures reported by reducers then the attempt's finish time is set to the time the task was retroactively failed rather ...
, 2014-04-10, 14:11
[MAPREDUCE-5670] CombineFileRecordReader should report progress when moving to the next file
...If a combine split consists of many "empty" files (i.e.: no record found by the underlying record reader) then theoretically a task can timeout due to lack of reported progress....
, 2014-04-10, 14:11
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