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Raising the size of my hdfs - MapReduce - [mail # user]
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...I get the following reports for a small virtual 4 node cluster - I think I might be low on space - especially since I want to upload about 1 gb but am too much of a newbie to know how to rai...
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Author: Steve Lewis,
2010-06-22, 23:33
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Re: HDFS Errors - MapReduce - [mail # user]
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...training@hadoop1:~$ hadoop dfsadmin -safemode get Safe mode is OFF training@hadoop1:~$ hadoop dfsadmin -refreshNodes training@hadoop1:~$ hadoop fs -copyFromLocal small_yeast /user/trai...
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Author: Steve Lewis,
2010-06-22, 20:58
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HDFS Errors - MapReduce - [mail # user]
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...when I say hadoop fs -copyFromLocal small_yeast /user/training/small_yeast I get org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/training/small_yeast/yeast...
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Author: Steve Lewis,
2010-06-22, 19:55
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Re: Need help with exception when mapper emits different key class from reducer - MapReduce - [mail # user]
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...Wow - I cannot tell you how much I thank you - I totally missed the fact that the exception is thrown in the combiner since I was seeing the exception in the reducer - I always thought...
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Author: Steve Lewis,
2010-06-19, 17:01
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Need help with exception when mapper emits different key class from reducer - MapReduce - [mail # user]
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...This class is a copy of a standard WordCount class with one critical exception Instead of the Mapper Emitting a Key of Type Text it emits a key of type MyText - s simple subclass of Text The...
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Author: Steve Lewis,
2010-06-18, 18:09
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Re: Problem with Reducer emitting a different Key than Mapper - MapReduce - [mail # user]
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...Yes - that was the problem - thanks On Wed, Jun 16, 2010 at 9:26 AM, Alex Kozlov wrote: Steven M. Lewis PhD Institute for Systems Biology Seattle WA...
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Author: Steve Lewis,
2010-06-16, 20:27
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Problem with Reducer emitting a different Key than Mapper - MapReduce - [mail # user]
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...Problem with Reducer emitting a different Key than Mapper IO have the FOllowing code where the Mapper emits a custom Key and the reducer isa expected to emit text Using Hadoop 0.2 on a...
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Author: Steve Lewis,
2010-06-16, 16:15
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Mixing streaming and regular map reduct jobs - MapReduce - [mail # user]
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...I have a problem where I am using Java and the hadoop APIS to run a map reduce job on data that can be considered as a set of lines of text. At the reduce stage I have a collection of lines ...
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Author: Steve Lewis,
2010-06-11, 16:17
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Setting a custom splitter and/or tracking files split? - MapReduce - [mail # user]
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...I am running into an issue that the splitter is reading the wrong file and causing my program to fail - I cannot find which file is being read - context.getConfiguration().get("map.inp...
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Author: Steve Lewis,
2010-06-11, 16:14
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