Answer / Anil Kumar Bharti

Debugging Hadoop code can be achieved by using tools like Hadoop's built-in debugger, or external tools such as Eclipse or IntelliJ IDEA. To use the built-in debugger, set the '-Dcom.sun.management.jdp.vmservice' flag when starting the Hadoop job, and use the jdb command in the mapper or reducer script. For external tools, you can attach them to the running JobTracker process.

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