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[MAPREDUCE-3619] Change streaming code to use new mapreduce api. - MapReduce - [issue]
...If we run a streaming job with following python script as mapper or reducer, the job will throws NullPointerException.#!/usr/bin/pythonimport sys,osclass MyTask:  def __init__(self...
http://issues.apache.org/jira/browse/MAPREDUCE-3619    Author: Liyin Liang, 2012-01-09, 14:43
[MAPREDUCE-3598] Old combiner doesn't support counter, progress - MapReduce - [issue]
...After HADOOP-5382, old combiner's reduce is invoked with Reporter.NULL. So all the features in Reporter, e.g. counter, progress are not supported any more. The related code is as follows:whi...
http://issues.apache.org/jira/browse/MAPREDUCE-3598    Author: Liyin Liang, 2011-12-26, 08:37
[MAPREDUCE-2714] When a job is retired by the same user's another job, its jobconf file is not deleted from the log directory of the JobTracker - MapReduce - [issue]
...After MAPREDUCE-130, the job's conf copy will be deleted from the log directory of the JobTracker when the job is retired. However, it just works if the job is retired by RetireJobs thread o...
http://issues.apache.org/jira/browse/MAPREDUCE-2714    Author: Liyin Liang, 2011-11-11, 06:26
[MAPREDUCE-2510] TaskTracker throw OutOfMemoryError after upgrade to jetty6 - MapReduce - [issue]
...Our product cluster's TaskTracker sometimes throw OutOfMemoryError after upgrade to jetty6. The exception in TT's log is as follows:2011-05-17 19:16:40,756 ERROR org.mortbay.log: Error for /...
http://issues.apache.org/jira/browse/MAPREDUCE-2510    Author: Liyin Liang, 2011-07-20, 13:57
[MAPREDUCE-2168] We should  implement limits on shuffle connections to TaskTracker per job - MapReduce - [issue]
...As trailing map tasks will be attacked by all reduces simultaneously, all the worker threads that for the http server of a TaskTracker may be occupied  by one job's reduce tasks to fetc...
http://issues.apache.org/jira/browse/MAPREDUCE-2168    Author: Liyin Liang, 2010-11-01, 16:03
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