Hello, I am a beginner and I have downloaded Hadoop 0.20.2. I would like to make some changes in some of the classes of Hadoop and import them into hadoop-0.20.2-core.jar so that they are visible to the mapreduce programs. What is the best way to do this? What should I do if I find the changes at JIRA, for example if I want to change the LoadIncrementalHFiles class as mentioned at https://issues.apache.org/jira/browse/HBASE-3714? Is it the same procedure?
Thank you in advance!! Panagiotis Antonopoulos.