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[MAPREDUCE-4816] JobImpl Invalid event: JOB_TASK_ATTEMPT_COMPLETED at FAILED - MapReduce - [issue]
...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 ...
http://issues.apache.org/jira/browse/MAPREDUCE-4816    Author: Jason Lowe, 2014-04-23, 21:04
[MAPREDUCE-5251] Reducer should not implicate map attempt if it has insufficient space to fetch map output - MapReduce - [issue]
...A job can fail if a reducer happens to run on a node with insufficient space to hold a map attempt's output.  The reducer keeps reporting the map attempt as bad, and if the map attempt ...
http://issues.apache.org/jira/browse/MAPREDUCE-5251    Author: Jason Lowe, 2014-04-23, 20:03
[MAPREDUCE-4852] Reducer should not signal fetch failures for disk errors on the reducer's side - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-4852    Author: Jason Lowe, 2014-04-23, 20:03
[MAPREDUCE-5603] Ability to disable FileInputFormat listLocatedStatus optimization to save client memory - MapReduce - [issue]
...It would be nice if users had the option to disable the listLocatedStatus optimization in FileInputFormat to save client memory....
http://issues.apache.org/jira/browse/MAPREDUCE-5603    Author: Jason Lowe, 2014-04-22, 18:34
[MAPREDUCE-4283] Display tail of aggregated logs by default - MapReduce - [issue]
...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 ...
http://issues.apache.org/jira/browse/MAPREDUCE-4283    Author: Jason Lowe, 2014-04-21, 19:17
[MAPREDUCE-4937] MR AM handles an oversized split metainfo file poorly - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-4937    Author: Jason Lowe, 2014-04-20, 15:09
[MAPREDUCE-5267] History server should be more robust when cleaning old jobs - MapReduce - [issue]
...Ran across a situation where an admin user had accidentally created a directory in one of the date directories under /mapred/history/done/ that was not readable by the historyserver user. &n...
http://issues.apache.org/jira/browse/MAPREDUCE-5267    Author: Jason Lowe, 2014-04-14, 15:20
[MAPREDUCE-5830] HostUtil.getTaskLogUrl is not backwards binary compatible with 2.3 - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-5830    Author: Jason Lowe, 2014-04-12, 18:41
[MAPREDUCE-5570] Map task attempt with fetch failure has incorrect attempt finish time - MapReduce - [issue]
...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 ...
http://issues.apache.org/jira/browse/MAPREDUCE-5570    Author: Jason Lowe, 2014-04-10, 14:11
[MAPREDUCE-5670] CombineFileRecordReader should report progress when moving to the next file - MapReduce - [issue]
...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....
http://issues.apache.org/jira/browse/MAPREDUCE-5670    Author: Jason Lowe, 2014-04-10, 14:11
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