Hi,
I am learning insides of Hadoop by following a map reduce job in Eclipse
debugger with break points. I am using MiniYARNcluster. Most of sequence
goes according to Hadoop books and lessons I have studied before. Except
none of the break points are stopping in ApplicationMaster or MRAppMaster
java classes. I see that ApplicationMasterLauncher,
ApplicationMasterService, ApplicationMasterProtocol
(ApplicationMasterProtocolPBServiceImpl) get invoked, but no actual
applicationMaster class.
Can someone please answer: Is there other main application master class
that I do not know (besides ApplicationMaster and MRAppMaster)? is
ApplicationMaster not always invoked as a class? If yes, what are the cases
and what class running services (such as sending container allocation
requests) in this case?
Thank you in advanse,
Sasha
