Hi, For my research project, I need to add a couple of functions in JobTracker.java source file to include additional information about TaskTrackers resource usage through heartbeat messages. I made those changes to JobTracker.java file. However, I am not very clear how to see these effects. I mean what are the next steps in terms of building the entire Hadoop code base, using the built distribution and installing it again in the cluster, etc? Any elaborate updates on these will be very useful since I do not have much experience in doing modifications to Hadoop like huge code base and observing the effects of these changes.
Thanks, Bikash
