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[MAPREDUCE-5513] ConcurrentModificationException in JobControl - MapReduce - [issue]
...JobControl.toList is locking individual lists to iterate them, but those lists can be modified elsewhere without holding the list lock.  The locking approaches are mismatched, with toLi...
http://issues.apache.org/jira/browse/MAPREDUCE-5513    Author: Jason Lowe, 2014-02-13, 20:55
[MAPREDUCE-5746] Job diagnostics can implicate wrong task for a failed job - MapReduce - [issue]
...We've seen a number of cases where the history server is showing the wrong task as the reason a job failed.  For example, "Task task_1383802699973_515536_m_027135 failed 1 times" when s...
http://issues.apache.org/jira/browse/MAPREDUCE-5746    Author: Jason Lowe, 2014-02-13, 14:53
[expand - 1 more] - Re: Re-swizzle 2.3 - MapReduce - [mail # dev]
...I noticed that somehow the target version field in JIRA was invisibly cleared on most of the Blocker/Critical JIRAs that were originally targeted for 2.3.0/2.4.0.  I happened to have an...
   Author: Jason Lowe, 2014-01-29, 20:31
[MAPREDUCE-5534] Improve job configuration handling when MapReduce deployed via HDFS - MapReduce - [issue]
...This is a followup JIRA to MAPREDUCE-4421.  Currently the *-site.xml files are loaded from files already present on each node, but loading of those site files may not be appropriate...
http://issues.apache.org/jira/browse/MAPREDUCE-5534    Author: Jason Lowe, 2014-01-28, 23:33
[MAPREDUCE-5730] AM log is truncated - MapReduce - [issue]
...The ApplicationMaster log is being truncated with only the log messages up until around the point where the job is being setup are present....
http://issues.apache.org/jira/browse/MAPREDUCE-5730    Author: Jason Lowe, 2014-01-28, 23:33
[MAPREDUCE-5584] ShuffleHandler becomes unresponsive during gridmix runs and can leak file descriptors - MapReduce - [issue]
...While running gridmix on 2.3 we noticed that jobs are running much slower than normal.  We tracked this down to reducers having difficulties shuffling data from maps.  Details to f...
http://issues.apache.org/jira/browse/MAPREDUCE-5584    Author: Jason Lowe, 2014-01-24, 15:55
[MAPREDUCE-5717] Task pings are interpreted as task progress - MapReduce - [issue]
http://issues.apache.org/jira/browse/MAPREDUCE-5717    Author: Jason Lowe, 2014-01-18, 13:27
[MAPREDUCE-5503] TestMRJobClient.testJobClient is failing - MapReduce - [issue]
...TestMRJobClient.testJobClient is failing on trunk and causing precommit builds to complain:testJobClient(org.apache.hadoop.mapreduce.TestMRJobClient)  Time elapsed: 26.361 sec  <...
http://issues.apache.org/jira/browse/MAPREDUCE-5503    Author: Jason Lowe, 2013-12-11, 03:49
[MAPREDUCE-5543] In-memory map outputs can be leaked after shuffle completes in 0.23 - MapReduce - [issue]
...MergeManagerImpl#close adds the contents of inMemoryMergedMapOutputs and inMemoryMapOutputs to a list of map outputs that is subsequently processed, but it does not clear those sets.  T...
http://issues.apache.org/jira/browse/MAPREDUCE-5543    Author: Jason Lowe, 2013-12-10, 14:55
Re: Next releases - MapReduce - [mail # dev]
...I think a lot of confusion comes from the fact that the 2.x line is  starting to mature.  Before this there wasn't such a big contention of  what went into patch vs. minor rel...
   Author: Jason Lowe, 2013-11-13, 21:55
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