Hi, I am trying to install an environment to start trying out some modifications to hadoop. All what I need is to have an eclipse project than I can modify, build, and generate a new hadoop jar file (like hadoop-core.jar). I followed the instructions in this page ( http://wiki.apache.org/hadoop/EclipseEnvironment) till getting all the builds performed successfully. Then, I added the 4 projects (hadoop-common-project, hadoop-assemblies, hadoop-hdfs-project, and hadoop-mapreduce-project) to eclipse. Then, I found several compilation errors in the the 3 projects (hadoop-common-project, hadoop-hdfs-project, and hadoop-mapreduce-project).
I cannot find any clue to figure out what is wrong. Actually, I am new to hadoop. Is there a simpler way to modify mapreduce code, build it and get the modified jar? --ahmed
