Every project in the Apache Hadoop environment (Pig, Hive, etc.) have a "tar" target in their build framework. The tar targets build a distributable archive for the source provided (something like downloading a release from apache's sites, but you've made it yourself here). If you would like only the jars (which you can replace and go ahead in most situations), I believe there's also a "jar" target in most of these projects.
If I were to add HBASE-3714 to my HBase distribution (assuming it applies without much trouble), I would do: 1) cd to HBASE_HOME 2) patch -p0 < ~/Path/to/diff.patch 3) mvn package [maven since HBase uses Maven AFAIK] 4) cd to target/ and locate the tar distributable file [You can use find, etc. tools to locate it as well] The procedure differs slightly for each of these Java projects based on what tool they may be using as their build framework, but the idea remains the same: patch/modify source, compile, jar/tar/package 2011/4/29 Panayotis Antonopoulos <antonopoulos...@hotmail.com>: > > 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. > -- Harsh J
