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[MAPREDUCE-1946] enhance FileInputFormat.setInputPaths() - MapReduce - [issue]
...FileInputFormat.setInputPaths(Job job, Path... inputPaths) can be enhanced in the following 3 ways:1) when the input paths are known only at runtime, we need another form which accepts Colle...
http://issues.apache.org/jira/browse/MAPREDUCE-1946    Author: Ted Yu, 2010-07-16, 03:11
Re: specify different number of mapper tasks for different machines - MapReduce - [mail # user]
...hadoop-daemon.sh also needs to be modified - it would wipe your custom config files:     if [ "$HADOOP_MASTER" != "" ]; then       echo rsync from $HADOOP_MASTER &nb...
   Author: Ted Yu, 2010-07-14, 19:06
[expand - 1 more] - Re: Fixing a failed reduce task - MapReduce - [mail # user]
...Feel free to comment on https://issues.apache.org/jira/browse/MAPREDUCE-1928  On Tue, Jul 13, 2010 at 6:57 PM, Steve Lewis  wrote:  ...
   Author: Ted Yu, 2010-07-14, 02:40
SequenceFile and hadoop sync - MapReduce - [mail # dev]
...We are using cdh3b2 which contains append/sync functionality. Our code uses SequenceFile.BlockCompressWriter.append() to write to sequence file. Since FSDataOutputStream out doesn't have pub...
   Author: Ted Yu, 2010-07-12, 22:29
[expand - 2 more] - Re: Shuffle Error: Exceeded MAX_FAILED_UNIQUE_FETCHES; bailing-out. - MapReduce - [mail # user]
...Did you check task tracker log and log from your reducer to see if anythng was wrong ? Please also capture jstack output so that we can help you diagnose.  On Friday, July 9, 2010, bmde...
   Author: Ted Yu, 2010-07-09, 13:18
Re: naming the output fle of reduce to the partition number - MapReduce - [mail # user]
...Please take a look at getUniqueName() method of src/mapred/org/apache/hadoop/mapred/FileOutputFormat.java It retrieves "mapred.task.partition"  On Thu, Jul 8, 2010 at 2:13 AM, Denim Liv...
   Author: Ted Yu, 2010-07-08, 17:22
Re: SerializationFactory NullPointerException - MapReduce - [mail # user]
...You should add this: job.setInputFormatClass(TextInputFormat.class);  And your TokenizerMapper should extend Mapperwrote:  ...
   Author: Ted Yu, 2010-06-30, 21:11
Re: Need help with exception when mapper emits different key class from reducer - MapReduce - [mail # user]
...There is no need to call job.setCombinerClass() Combiner is optional.  On Sat, Jun 19, 2010 at 10:01 AM, Steve Lewis  wrote:  ...
   Author: Ted Yu, 2010-06-19, 17:55
Re: trouble kick starting thriftfs - MapReduce - [mail # dev]
...You need to build the jar yourself. Refer to: http://osg-test2.unl.edu/documentation/hadoop/building-a-hadoop-release  Under hadoop-0.20.2/src/contrib/thriftfs, type: ant jar  You ...
   Author: Ted Yu, 2010-06-18, 00:10
Re: Multithreaded Mapper and Map runner - MapReduce - [mail # user]
...If only thread is created to run mapper/reducer, how would mapred.child.java.opts be effective ?  Please refer to src/mapred/org/apache/hadoop/mapred/TaskRunner.java which is not very l...
   Author: Ted Yu, 2010-06-17, 04:59
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