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Re: Ubuntu Single Node Tutorial failure. No live or dead nodes. - Hadoop - [mail # user]
...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...
   Author: Aaron Kimball, 2010-02-13, 01:10
Re: Identity Reducer - Hadoop - [mail # user]
...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:  ...
   Author: Aaron Kimball, 2010-02-12, 04:55
Re: Any alternative for MultipleOutputs class in hadoop 0.18.3 - Hadoop - [mail # user]
...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:  ...
   Author: Aaron Kimball, 2010-02-12, 01:21
Re: Static state in Configuration and elsewhere - Hadoop - [mail # dev]
...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 ...
   Author: Aaron Kimball, 2010-02-11, 19:41
Re: map side only behavior - Hadoop - [mail # user]
...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...
   Author: Aaron Kimball, 2010-01-31, 22:05
Re: DBOutputFormat Speed Issues - Hadoop - [mail # user]
...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...
   Author: Aaron Kimball, 2010-01-31, 22:03
Re: hadoop under cygwin issue - Hadoop - [mail # user]
...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 ...
   Author: Aaron Kimball, 2010-01-31, 21:54
Re: build and use hadoop-git - Hadoop - [mail # dev]
...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:  ...
   Author: Aaron Kimball, 2010-01-24, 08:11
Re: Multiple file output - Hadoop - [mail # user]
...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...
   Author: Aaron Kimball, 2010-01-07, 19:11
[expand - 1 more] - Re: Re: Re: Re: Doubt in Hadoop - Hadoop - [mail # user]
...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...
   Author: Aaron Kimball, 2009-12-01, 01:14
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB