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[MAPREDUCE-5042] Reducer unable to fetch for a map task that was recovered - MapReduce - [issue]
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...If an application attempt fails and is relaunched the AM will try to recover previously completed tasks. If a reducer needs to fetch the output of a map task attempt that was recovered...
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http://issues.apache.org/jira/browse/MAPREDUCE-5042
Author: Jason Lowe,
2013-03-16, 14:05
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[MAPREDUCE-4993] AM thinks it was killed when an error occurs setting up a task container launch context - MapReduce - [issue]
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...If an IOException occurs while setting up a container launch context for a task then the AM exits with a KILLED status and no diagnostics. The job should be marked as FAILED (or maybe ...
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http://issues.apache.org/jira/browse/MAPREDUCE-4993
Author: Jason Lowe,
2013-03-07, 15:30
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[MAPREDUCE-5027] Shuffle does not limit number of outstanding connections - MapReduce - [issue]
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...The ShuffleHandler does not have any configurable limits to the number of outstanding connections allowed. Therefore a node with many map outputs and many reducers in the cluster tryin...
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http://issues.apache.org/jira/browse/MAPREDUCE-5027
Author: Jason Lowe,
2013-03-06, 14:04
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[MAPREDUCE-4842] Shuffle race can hang reducer - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-4842
Author: Jason Lowe,
2013-03-06, 02:14
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[MAPREDUCE-5044] Have AM trigger jstack on task attempts that timeout before killing them - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-5044
Author: Jason Lowe,
2013-03-02, 18:12
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[MAPREDUCE-4794] DefaultSpeculator generates error messages on normal shutdown - MapReduce - [issue]
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...DefaultSpeculator can log the following error message on a normal shutdown of the ApplicationMaster:2012-11-13 01:35:31,841 ERROR [DefaultSpeculator background processing] org.apache.hadoop....
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http://issues.apache.org/jira/browse/MAPREDUCE-4794
Author: Jason Lowe,
2013-03-02, 14:05
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[MAPREDUCE-4871] AM uses mapreduce.jobtracker.split.metainfo.maxsize but mapred-default has mapreduce.job.split.metainfo.maxsize - MapReduce - [issue]
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...When the user needs to configure a larger split metainfo file size, mapred-default.xml points to the mapreduce.job.split.metainfo.maxsize property. However the ApplicationMaster actual...
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http://issues.apache.org/jira/browse/MAPREDUCE-4871
Author: Jason Lowe,
2013-03-01, 14:04
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[MAPREDUCE-5037] JobControl logging when a job completes - MapReduce - [issue]
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...JobControl emits logs, via the logging in Job.submit(), whenever a job is launched. It would be nice if it also logged when active jobs it is tracking complete and their final status (...
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http://issues.apache.org/jira/browse/MAPREDUCE-5037
Author: Jason Lowe,
2013-02-28, 17:07
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[MAPREDUCE-4693] Historyserver should provide counters for failed tasks - MapReduce - [issue]
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...Currently the historyserver is not providing counters for failed tasks, even though they are available via the AM as long as the job is still running. Those counters are lost when the ...
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http://issues.apache.org/jira/browse/MAPREDUCE-4693
Author: Jason Lowe,
2013-02-28, 13:20
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[MAPREDUCE-4831] Task commit can occur more than once due to AM retries - MapReduce - [issue]
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...If a task attempt begins committing but the AM crashes before the task attempt completes then we could end up having the task commit again when the AM is relaunched. The subsequent AM ...
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http://issues.apache.org/jira/browse/MAPREDUCE-4831
Author: Jason Lowe,
2013-02-27, 23:38
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