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Re: Writing small files to one big file in hdfs - Hadoop - [mail # user]
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...It looks like in mapper values are coming as binary instead of Text. Is this expected from sequence file? I initially wrote SequenceFile with Text values. On Tue, Feb 21, 2012 at 4:13 ...
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Author: Mohit Anchlia,
2012-02-22, 00:50
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Re: Writing small files to one big file in hdfs - Hadoop - [mail # user]
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...Need some more help. I wrote sequence file using below code but now when I run mapreduce job I get "file.*java.lang.ClassCastException*: org.apache.hadoop.io.LongWritable cannot be cast to o...
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Author: Mohit Anchlia,
2012-02-22, 00:13
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Re: Writing to SequenceFile fails - Hadoop - [mail # user]
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...I am past this error. Looks like I needed to use CDH libraries. I changed my maven repo. Now I am stuck at *org.apache.hadoop.security.AccessControlException *since I am not writing as...
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Author: Mohit Anchlia,
2012-02-21, 21:45
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Writing to SequenceFile fails - Hadoop - [mail # user]
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...I am trying to write to the sequence file and it seems to be failing. Not sure why, Is there something I need to do String uri="hdfs://db1:54310/examples/testfile1.seq"; FileSyst...
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Author: Mohit Anchlia,
2012-02-21, 20:48
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Re: Writing small files to one big file in hdfs - Hadoop - [mail # user]
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...Sorry may be it's something obvious but I was wondering when map or reduce gets called what would be the class used for key and value? If I used "org.apache.hadoop.io.Text value = *new* org....
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Author: Mohit Anchlia,
2012-02-21, 20:04
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Re: Writing small files to one big file in hdfs - Hadoop - [mail # user]
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...Thanks How does mapreduce work on sequence file? Is there an example I can look at? On Tue, Feb 21, 2012 at 11:34 AM, Arko Provo Mukherjee wrote: ...
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Author: Mohit Anchlia,
2012-02-21, 19:38
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Re: Writing small files to one big file in hdfs - Hadoop - [mail # user]
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...I am trying to look for examples that demonstrates using sequence files including writing to it and then running mapred on it, but unable to find one. Could you please point me to some examp...
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Author: Mohit Anchlia,
2012-02-21, 19:27
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Re: Writing small files to one big file in hdfs - Hadoop - [mail # user]
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...On Tue, Feb 21, 2012 at 9:25 AM, Bejoy Ks wrote: for processing. Would it work with sequence file? This text file that I was referring to would be in hdfs itself. Is it sti...
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Author: Mohit Anchlia,
2012-02-21, 17:30
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Setting eclipse for map reduce using maven - Hadoop - [mail # user]
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...I am trying to search for dependencies that would help me get started with developing map reduce in eclipse and I prefer to use maven for this. Could someone help me point to direction...
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Author: Mohit Anchlia,
2012-02-21, 17:18
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Difference between hdfs dfs and hdfs fs - Hadoop - [mail # user]
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...What's the different between hdfs dfs and hdfs fs commands? When I run hdfs dfs -copyFromLocal /assa . and use pig it can't find it but when I use hdfs fs pig is able to find the file....
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Author: Mohit Anchlia,
2012-02-21, 17:16
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