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Mapreduce

3 Articles
Soumen Chandra
3 min read Min Read
My learning phase with Hadoop is still continuing. During this phase what I found is a great lack of a comprehensive POC which covers at least a few prominent Hadoop technologies. My POC can fill up that void. After having set up CDH4.7 in my laptop, I completed implementation...
Abhijit Ghosh
7 min read Min Read
If you are getting "Exception from container-launch:org.apache.hadoop.util.Shell$ExitCodeException" in FAILED application's Diagnostics (or Command prompt) and "java.lang.NoClassDefFoundError: org/apache/hadoop/service/CompositeService" in 'stderr' containerlogs while running any Hadoop example on Windows, then add all the required Hadoop jars to the property 'yarn....
Abhijit Ghosh
4 min read Min Read
In this post, we'll use HDFS command 'bin\hdfs dfs' with different options like mkdir, copyFromLocal, cat, ls and finally run the wordcount MapReduce job provided in %HADOOP_HOME%\share\hadoop\mapreduce\hadoop-mapreduce-examples-2.2.0.jar. On successful execution of the job in the Single Node (pseudo-distributed mode) cluster, an...