I\'m new to whirr and AWS so apologies in advance if I\'m asking something silly. I\'m following the directions here to set up whirr and
Is there a way to use the relation name in MapReduce\'s Map and Reduce? I am trying to do Set difference using Hadoop\'s MapReduce.
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I downloaded the hadoop eclip开发者_运维技巧e plug-in from this website: https://issues.apache.org/jira/browse/MAPREDUCE-1262
am trying to set up apache hadoop in my system. In the procedure page it says \"edit the file conf/hadoop-env.sh to define at least JAVA_HOME to be the root of your Java i开发者_如何学Cnstallation. \"
There are two arguments, a URI and a Configuration. I assume that the JobConf object that the client is set to should work for Configuration, but what about the URI?
I\'m trying to create or open a file to store some output in HDFS, but I\'m getting a NullPointerException when I call the exists method in the second to last line of the code snippet below:
Problem Following up on this question, it seems that a file- or disk-based Map implementation may be the right solution to the problems I mentioned there. Short version:
I\'m trying to run a Map-Reduce job on Hadoop Streaming with Python scripts and getting the same errors as Hadoop Streaming Job failed error in python but those solutions didn\'t work for me.
I searched the we开发者_如何学Cb, but all I found was a site that claimed that it could be done. It didn\'t say how.FileSystem fs = FileSystem.get(conf);
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