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Re: Ubuntu Single Node Tutorial failure. No live or dead nodes. - Hadoop - [mail # user]
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...Sonal, Can I ask why you're sleeping between starting hdfs and mapreduce? I've never needed this in my own code. In general, Hadoop is pretty tolerant about starting daemons "out of or...
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Author: Aaron Kimball,
2010-02-13, 01:10
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Re: Identity Reducer - Hadoop - [mail # user]
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...Can you post the entire exception with its accompanying stack trace? - Aaron On Thu, Feb 11, 2010 at 5:26 PM, Prabhu Hari Dhanapal wrote: ...
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Author: Aaron Kimball,
2010-02-12, 04:55
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Re: Any alternative for MultipleOutputs class in hadoop 0.18.3 - Hadoop - [mail # user]
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...There's an older mechanism called MultipleOutputFormat which may do what you need. - Aaron On Fri, Feb 5, 2010 at 10:13 AM, Udaya Lakshmi wrote: ...
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Author: Aaron Kimball,
2010-02-12, 01:21
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Re: Static state in Configuration and elsewhere - Hadoop - [mail # dev]
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...There are an enormous number of examples of the following line in user-side code: Configuration conf = new Configuration(); ... This is going to need to still work transparently ...
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Author: Aaron Kimball,
2010-02-11, 19:41
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Re: map side only behavior - Hadoop - [mail # user]
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...In a map-only job, map tasks will be connected directly to the OutputFormat . So calling output.collect() / context.write() in the mapper will emit data straight to files in HDFS without sor...
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Author: Aaron Kimball,
2010-01-31, 22:05
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Re: DBOutputFormat Speed Issues - Hadoop - [mail # user]
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...Nick, I'm afraid that right now the only available OutputFormat for JDBC is that one. You'll note that DBOutputFormat doesn't really include much support for special-casing to MySQL or...
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Author: Aaron Kimball,
2010-01-31, 22:03
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Re: hadoop under cygwin issue - Hadoop - [mail # user]
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...Brian, it looks like you missed a step in the instructions. You'll need to format the hdfs filesystem instance before starting the NameNode server: You need to run: $ bin/hadoop ...
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Author: Aaron Kimball,
2010-01-31, 21:54
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Re: build and use hadoop-git - Hadoop - [mail # dev]
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...See http://wiki.apache.org/hadoop/HowToContribute for more step-by-step instructions. - Aaron On Fri, Jan 22, 2010 at 7:36 PM, Kay Kay wrote: ...
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Author: Aaron Kimball,
2010-01-24, 08:11
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Re: Multiple file output - Hadoop - [mail # user]
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...Note that org.apache.hadoop.mapreduce.lib.output.MultipleOutputs is scheduled for the next CDH 0.20 release -- ready "soon." - Aaron 2010/1/6 Amareshwari Sri Ramadasu r...
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Author: Aaron Kimball,
2010-01-07, 19:11
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Re: Re: Re: Re: Doubt in Hadoop - Hadoop - [mail # user]
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...You need to send a jar to the cluster so it can run your code there. Hadoop doesn't magically know which jar is the one containing your main class, or that of your mapper/reducer -- so you n...
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Author: Aaron Kimball,
2009-12-01, 01:14
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