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Re: Un-deprecate the old MapReduce API? - MapReduce - [mail # dev]
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...On the various pieces, I think: 0.20: -0 for removing the deprecation, +1 for improving the deprecation message with links to the corresponding class. 0.21: new core api should b...
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Author: Owen O'Malley,
2010-04-22, 13:55
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[MAPREDUCE-1274] The completed job web ui urls include full path names to the local file system on the JobTracker. - MapReduce - [issue]
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...Currently, the web ui for MapReduce in 0.21.0-dev include a path to a local file in the url:http://jt.foo.com:50030/jobdetailshistory.jsp?jobid=job_200912012129_0001&logFile=file%3A%2Fop...
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http://issues.apache.org/jira/browse/MAPREDUCE-1274
Author: Owen O'Malley,
2010-04-21, 17:56
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Re: Reflective instantiation of Mappers and Reducers - MapReduce - [mail # user]
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...On Apr 2, 2010, at 12:05 PM, Kris Nuttycombe wrote: Currently the best you can do is to make your Mapper or Reduce implement Configurable and use the values out of the configur...
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Author: Owen O'Malley,
2010-04-02, 21:10
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[MAPREDUCE-1669] The imported JSON credentials should support binary secrets. - MapReduce - [issue]
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...Currently, we support adding a file with secrets to a job. It can either be in binary or JSON, but the JSON format assumes that all of the secrets are UTF-8, which is often false. We should ...
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http://issues.apache.org/jira/browse/MAPREDUCE-1669
Author: Owen O'Malley,
2010-04-02, 17:46
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[MAPREDUCE-1484] Framework should not sort the input splits - MapReduce - [issue]
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...Currently the framework sorts the input splits by size before the job is submitted. This makes it very difficult to run map only jobs that transform the input because the assignment of input...
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http://issues.apache.org/jira/browse/MAPREDUCE-1484
Author: Owen O'Malley,
2010-03-04, 02:05
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[MAPREDUCE-238] OutputFormat should be given the reduce id directly rather than a filename - MapReduce - [issue]
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...The OutputFormat API should be changed to be more evolution proof:public interface OutputFormatContext { JobConf getJobConf(); Progressable getProgress();}public interf...
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http://issues.apache.org/jira/browse/MAPREDUCE-238
Author: Owen O'Malley,
2010-02-11, 06:20
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Re: Strange behaviour from a custom Writable - MapReduce - [mail # user]
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...On Feb 8, 2010, at 9:37 PM, Amogh Vasekar wrote: As previously mentioned, if you are trying to sort the values, please refer to the secondary sort example. It shows how t...
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Author: Owen O'Malley,
2010-02-09, 15:50
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Re: Does the class of the Mapper output need to match the exact class of the specified output? - MapReduce - [mail # user]
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...On Jan 26, 2010, at 5:17 PM, Wilkes, Chris wrote: For Writables, the simple answer is yes. It happens because the way you deserialize is to: Writable obj = ReflectionUtil...
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Author: Owen O'Malley,
2010-02-02, 16:18
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Re: Moving HDFS raid package from HDFS repository to MAPREDUCE repository - MapReduce - [mail # dev]
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...The issue is that we need to avoid loops in the project dependencies. Therefore, the order has to go: Common <- HDFS <- MapReduce The problem is that RAID needs MapReduce a...
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Author: Owen O'Malley,
2010-01-22, 22:28
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Re: Only running hadoop Map tasks - MapReduce - [mail # user]
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...On Jan 5, 2010, at 9:13 AM, psdc1978 wrote: Set the number of reduce tasks to 0. Each map's unsorted output will be sent to the OutputFormat, which writes it to the outp...
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Author: Owen O'Malley,
2010-01-05, 18:32
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