For example my application contains some class SomeClass. And this
application uses hadoop mapreduce. What will be if Mapper in it's map
function calls a method of SomeClass?
If I understand correct mapper is running on child nodes. For that
parent sends mapper and JobConf to childs. Will it send SomeClass too in
our case? And what if SomeClass needs for example property files, saved
in the local file system, not in distributed FS? Will child apply for
such file to parent?
Maybe I ask stupid questions. I still don't have clear idea of how
hadoop works and especially how it realize parallelization.