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Re: Null mapper? - MapReduce - [mail # user]
...On Mon, Aug 16, 2010 at 3:21 PM, David Rosenstrauch  wro te: "no" I need  org.apache.hadoop.mapreduce.Mapper is the identity mapper: it simply emits the key-value pairs it was pass...
   Author: Tom White, 2010-08-18, 21:31
Re: 0.21? - MapReduce - [mail # user]
...Hi Torsten,  Have you by any chance tried the release candidate I created? If you've got any feedback from trying it out then please send it to http://www.mail-archive.com/[EMAIL PROTEC...
   Author: Tom White, 2010-07-16, 11:01
Re: building 0.21 - MapReduce - [mail # dev]
...Perhaps you're not getting up-to-date libraries? Try  common> ant clean jar mvn-install hdfs> ant veryclean jar mvn-install -Dresolvers=internal mapreduce> ant veryclean jar -D...
   Author: Tom White, 2010-06-08, 22:38
Re: Minutes: Hadoop Contributor Meeting 05/06/2010 - MapReduce - [mail # dev]
...Not sure why my attachment didn't make it to the list. Anyway, I've posted Arun's notes on the wiki at http://wiki.apache.org/hadoop/HadoopContributorsMeeting20100506, and included the conte...
   Author: Tom White, 2010-05-10, 17:18
Re: Un-deprecate the old MapReduce API? - MapReduce - [mail # dev]
...It sounds like there's no strong objection to un-deprecating the old API in 0.20 - I'll create a patch for this (see https://issues.apache.org/jira/browse/MAPREDUCE-1734).  0.21 is less...
   Author: Tom White, 2010-04-28, 05:02
Re: Reflective instantiation of Mappers and Reducers - MapReduce - [mail # user]
...Have a look at org.apache.hadoop.io.Stringifier (and DefaultStringifier), which may be helpful too.  Cheers, Tom  On Fri, Apr 2, 2010 at 3:35 PM, Kris Nuttycombe  wrote: t &nb...
   Author: Tom White, 2010-04-05, 03:40
[MAPREDUCE-1511] Examples should not use deprecated APIs - MapReduce - [issue]
...MAPREDUCE-777 deprecated some APIs which are still being used by the examples. This issue is to fix the examples so they use the replacements....
http://issues.apache.org/jira/browse/MAPREDUCE-1511    Author: Tom White, 2010-02-22, 04:45
Re: Why not making InputSplit implements interface Writable ? - MapReduce - [mail # dev]
...Hi Jeff,  InputSplit in the new MapReduce API (in the o.a.h.mapreduce package) does not implement Writable since splits can be serialized using any serialization framework - e.g. Java o...
   Author: Tom White, 2010-02-06, 17:01
[MAPREDUCE-1411] Infer MapReduce types where possible - MapReduce - [issue]
...Currently users must specify the output types of the map and reduce if they are different to the default (LongWritable keys, Text values). In many cases this information is available to the ...
http://issues.apache.org/jira/browse/MAPREDUCE-1411    Author: Tom White, 2010-01-26, 01:38
[MAPREDUCE-299] Check MapReduce types for consistency - MapReduce - [issue]
...It is possible to configure MapReduce programs to use an inconsistent set of types. Although some runtime checks are carried out, there are more that can be done as described in HADOOP-1231....
http://issues.apache.org/jira/browse/MAPREDUCE-299    Author: Tom White, 2010-01-26, 01:24
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