debug
Merge branch 'master' of https://github.com/mw-ding/MapReduceFramework.git
Merge branch 'master' of https://github.com/mw-ding/MapReduceFramework.git
Merge branch 'master' of https://github.com/mw-ding/MapReduceFramework.git
Merge branch 'master' of https://github.com/mw-ding/MapReduceFramework.git
debug