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[MAPREDUCE-4842] Shuffle race can hang reducer - MapReduce - [issue]
...Saw an instance where the shuffle caused multiple reducers in a job to hang.  It looked similar to the problem described in MAPREDUCE-3721, where the fetchers were all being told to WAI...
http://issues.apache.org/jira/browse/MAPREDUCE-4842    Author: Jason Lowe, 2013-07-26, 22:58
[MAPREDUCE-5124] AM lacks flow control for task events - MapReduce - [issue]
...The AM does not have any flow control to limit the incoming rate of events from tasks.  If the AM is unable to keep pace with the rate of incoming events for a sufficient period of time...
http://issues.apache.org/jira/browse/MAPREDUCE-5124    Author: Jason Lowe, 2013-07-19, 16:01
[MAPREDUCE-5211] Reducer intermediate files can collide during merge - MapReduce - [issue]
...The OnDiskMerger.merge method constructs an output path that is not unique to a reduce attempt, and as a result can result in a file collision with other reducers from the same app that are ...
http://issues.apache.org/jira/browse/MAPREDUCE-5211    Author: Jason Lowe, 2013-06-16, 13:25
[MAPREDUCE-4069] Cleanup task tokens interface - MapReduce - [issue]
...This tracks a couple of cleanup issues that were identified in MAPREDUCE-4043: It seems unnecessary to pass the job token and credentials separately when we always combine the job token into...
http://issues.apache.org/jira/browse/MAPREDUCE-4069    Author: Jason Lowe, 2013-06-13, 21:23
[MAPREDUCE-5307] Failure to launch a task attempt leads to missing failed attempt - MapReduce - [issue]
...When the AM tries to connect to a node to launch a task attempt but the launcher encounters an error (e.g.: RPC timeout, no connectivity to node, etc.), the error will count as a failed task...
http://issues.apache.org/jira/browse/MAPREDUCE-5307    Author: Jason Lowe, 2013-06-06, 17:20
[MAPREDUCE-5268] Improve history server startup performance - MapReduce - [issue]
...The history server can easily take many minutes to startup when there are a significant number of jobs to scan in the done directory.  However the scanning of files is not the bottlenec...
http://issues.apache.org/jira/browse/MAPREDUCE-5268    Author: Jason Lowe, 2013-06-04, 15:06
[MAPREDUCE-5261] TestRMContainerAllocator is exiting and failing the build - MapReduce - [issue]
...Recent builds are failing because TestRMContainerAllocator is exiting rather than succeeding or failing....
http://issues.apache.org/jira/browse/MAPREDUCE-5261    Author: Jason Lowe, 2013-05-31, 15:07
[MAPREDUCE-4235] Killing app can lead to inconsistent app status between RM and HS - MapReduce - [issue]
...If a client tries to kill an application that is about to complete, the application states between the ResourceManager's web UI and the history server can be inconsistent.  When the pro...
http://issues.apache.org/jira/browse/MAPREDUCE-4235    Author: Jason Lowe, 2013-05-24, 16:23
Re: [VOTE] Plan to create release candidate for 0.23.8 - MapReduce - [mail # dev]
...+1  On 05/17/2013 04:10 PM, Thomas Graves wrote:...
   Author: Jason Lowe, 2013-05-22, 13:36
[MAPREDUCE-5257] TestContainerLauncherImpl fails - MapReduce - [issue]
...TestContainerLauncherImpl is hanging and eventually being killed by the surefire timeout which fails a maven test build....
http://issues.apache.org/jira/browse/MAPREDUCE-5257    Author: Jason Lowe, 2013-05-20, 14:21
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