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[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, 2014-04-16, 17:55
[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
[MAPREDUCE-5778] JobSummary does not escape newlines in the job name - MapReduce - [issue]
...JobSummary is not escaping newlines in the job name.  This can result in a job summary log entry that spans multiple lines when users are expecting one-job-per-line output....
http://issues.apache.org/jira/browse/MAPREDUCE-5778    Author: Jason Lowe, 2014-04-10, 14:11
[MAPREDUCE-5757] ConcurrentModificationException in JobControl.toList - MapReduce - [issue]
...Despite having the fix for MAPREDUCE-5513 we saw another ConcurrencyModificationException in JobControl, so something there still isn't fixed....
http://issues.apache.org/jira/browse/MAPREDUCE-5757    Author: Jason Lowe, 2014-04-10, 14:11
[MAPREDUCE-4941] Use of org.apache.hadoop.mapred.lib.CombineFileRecordReader requires casting - MapReduce - [issue]
...Unlike its counterpart in org.apache.hadoop.mapreduce.lib.input, the CombineFileRecordReader in mapred requires a user to cast to a RecordReader since the constructor specification says it m...
http://issues.apache.org/jira/browse/MAPREDUCE-4941    Author: Jason Lowe, 2014-04-08, 15:33
Re: [VOTE] Release Apache Hadoop 2.4.0 - MapReduce - [mail # dev]
...Here's my late +1, was just finishing up looking at the release.- Verified signatures and digests- Examined LICENSE file- Installed binary distribution, ran some sample MapReduce jobs and ex...
   Author: Jason Lowe, 2014-04-07, 20:42
[MAPREDUCE-5044] Have AM trigger jstack on task attempts that timeout before killing them - MapReduce - [issue]
...When an AM expires a task attempt it would be nice if it triggered a jstack output via SIGQUIT before killing the task attempt.  This would be invaluable for helping users debug their h...
http://issues.apache.org/jira/browse/MAPREDUCE-5044    Author: Jason Lowe, 2014-03-31, 21:23
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