How to run and writting program on cluster?

I writed program count website from log file which I send parameter when run program( bin/hadoop jar webcount.jar WebCount webtudom.log output tudom ) tudom is third parameters which in wordcount when run program will send 2 parameter are in and out . I test run my program with single node then have result and no error but I test run my program with multiple node then no result. I don't know why so that. I attach my program for you check.

Thak for advance.