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Re: Mappers crashing due to running out of heap space during initialisation - MapReduce - [mail # user]
...Lower io.sort.mb or raise the heap size for the task. -C  On Tue, Apr 26, 2011 at 10:55 AM, James Hammerton  wrote:...
   Author: Chris Douglas, 2011-04-26, 19:02
Re: what is the difference between the two packages "org.apache.hadoop.mapreduce"and "org.apache.hadoop.mapred"? - MapReduce - [mail # user]
...On Tue, Apr 26, 2011 at 10:56 AM, Marcos Ortiz  wrote:  It supports both APIs. The MapReduce runtime is effectively unchanged. -C...
   Author: Chris Douglas, 2011-04-26, 18:59
Re: Best practices for jobs with large Map output - MapReduce - [mail # user]
...On Mon, Apr 18, 2011 at 3:42 AM, Shai Erera  wrote:  Without knowing the format of a Lucene index, I can't say whether this approach makes sense. Instead of handling the cleanup yo...
   Author: Chris Douglas, 2011-04-19, 18:47
Re: Best approach for accessing secondary map task outputs from reduce tasks? - MapReduce - [mail # user]
...On Sun, Feb 13, 2011 at 8:22 PM, Jason  wrote:  As listed in the assumptions, I thought each map emits only one datum that must be read by every reduce. Not one special datum among...
   Author: Chris Douglas, 2011-02-14, 13:43
[MAPREDUCE-1402] Remove src/benchmarks - MapReduce - [issue]
...src/benchmarks has not attracted many contributions. The versions of gridmix currently there are deprecated in in favor of the version in contrib (MAPREDUCE-776) and will be redundant after ...
http://issues.apache.org/jira/browse/MAPREDUCE-1402    Author: Chris Douglas, 2011-01-13, 02:27
[MAPREDUCE-2113] SequenceFile tests assume createWriter w/ overwrite - MapReduce - [issue]
...Many of the *SequenceFile tests create writers in a loop. This fails after HADOOP-6856, which will not overwrite the destination by default....
http://issues.apache.org/jira/browse/MAPREDUCE-2113    Author: Chris Douglas, 2010-10-25, 22:29
[MAPREDUCE-1299] Hudson uses an old version of eclipse to test patches - MapReduce - [issue]
...As diagnosed here, Hudson may be using an old version of eclipse....
http://issues.apache.org/jira/browse/MAPREDUCE-1299    Author: Chris Douglas, 2010-09-21, 00:42
[MAPREDUCE-1622] Include slf4j dependencies in binary tarball - MapReduce - [issue]
...After MAPREDUCE-1556 and HADOOP-6486, starting *Trackers from a binary tarball produces the following warning:SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".SLF4J: See h...
http://issues.apache.org/jira/browse/MAPREDUCE-1622    Author: Chris Douglas, 2010-08-24, 21:21
[MAPREDUCE-1412] TestTaskTrackerBlacklisting fails sometimes - MapReduce - [issue]
...TestTaskTrackerBlacklisting fails occasionally. The granularity of the timer is responsible; the unit test adds a day to the expiration interval to verify that the tracker is removed from th...
http://issues.apache.org/jira/browse/MAPREDUCE-1412    Author: Chris Douglas, 2010-08-24, 21:20
[MAPREDUCE-1406] JobContext.MAP_COMBINE_MIN_SPILLS is misspelled - MapReduce - [issue]
...JobContext.MAP_COMBINE_MIN_SPILLS is misspelled as JobContext.MAP_COMBINE_MIN_SPISS...
http://issues.apache.org/jira/browse/MAPREDUCE-1406    Author: Chris Douglas, 2010-08-24, 21:20
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