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[MAPREDUCE-5043] Fetch failure processing can cause AM event queue to backup and eventually OOM - MapReduce - [issue]
...Saw an MRAppMaster with a 3G heap OOM.  Upon investigating another instance of it running, we saw the UI in a weird state where the task table and task attempt tables in the job overvie...
http://issues.apache.org/jira/browse/MAPREDUCE-5043    Author: Jason Lowe, 2013-04-02, 15:31
[MAPREDUCE-5114] Subsequent AM attempt can crash trying to read prior AM attempt information - MapReduce - [issue]
...Saw the second AM attempt of a job fail early during startup because it tried to read the AMInfos from the previous attempt's history file and hit an error that wasn't an IOException.  ...
http://issues.apache.org/jira/browse/MAPREDUCE-5114    Author: Jason Lowe, 2013-03-28, 20:51
[MAPREDUCE-5090] TotalOrderPartitioner does not recognize total.order.partitioner.* settings - MapReduce - [issue]
...There is a backwards-compatibility issue where TotalOrderPartitioner no longer recognizes the Hadoop 1.x properties such as total.order.partitioner.natural.order, total.order.partitioner.max...
http://issues.apache.org/jira/browse/MAPREDUCE-5090    Author: Jason Lowe, 2013-03-21, 22:19
[MAPREDUCE-4784] TestRecovery occasionally fails - MapReduce - [issue]
...TestRecovery is occasionally failing with this error:testCrashed(org.apache.hadoop.mapreduce.v2.app.TestRecovery): TaskAttempt state is not correct (timedout) expected:<FAILED> but was...
http://issues.apache.org/jira/browse/MAPREDUCE-4784    Author: Jason Lowe, 2013-03-20, 01:39
[MAPREDUCE-5003] AM recovery should recreate records for attempts that were incomplete - MapReduce - [issue]
...As discussed in MAPREDUCE-4992, it would be nice if the AM recovered task attempt entries for all task attempts launched by the prior app attempt even if those task attempts did not complete...
http://issues.apache.org/jira/browse/MAPREDUCE-5003    Author: Jason Lowe, 2013-03-18, 19:54
[MAPREDUCE-4993] AM thinks it was killed when an error occurs setting up a task container launch context - MapReduce - [issue]
...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 ...
http://issues.apache.org/jira/browse/MAPREDUCE-4993    Author: Jason Lowe, 2013-03-07, 15:30
[MAPREDUCE-5027] Shuffle does not limit number of outstanding connections - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-5027    Author: Jason Lowe, 2013-03-06, 14:04
[MAPREDUCE-4871] AM uses mapreduce.jobtracker.split.metainfo.maxsize but mapred-default has mapreduce.job.split.metainfo.maxsize - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-4871    Author: Jason Lowe, 2013-03-01, 14:04
[MAPREDUCE-5037] JobControl logging when a job completes - MapReduce - [issue]
...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 (...
http://issues.apache.org/jira/browse/MAPREDUCE-5037    Author: Jason Lowe, 2013-02-28, 17:07
[MAPREDUCE-4831] Task commit can occur more than once due to AM retries - MapReduce - [issue]
...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 ...
http://issues.apache.org/jira/browse/MAPREDUCE-4831    Author: Jason Lowe, 2013-02-27, 23:38
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