I'm using Hortonworks sandbox for Hadoop, But I am using Eclipse on Windows for the Java code. And hortonworks sandbox installed in Oracle virtual box. I created executable jar for that Java code and then run in hortons. How do I debug the Java code in eclipse?
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One of the way debugging Hadoop in Eclipse is by running hadoop in local mode because map reduce task run in its own JVM.
Also explore MRUnit and Jumbune's debugger.
https://github.com/impetus-opensource/jumbune
The below blogposts may also help you.
http://let-them-c.blogspot.com/2011/07/running-hadoop-locally-on-eclipse.html
http://let-them-c.blogspot.com/2011/07/configurations-of-running-hadoop.html
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