If that's an error is encountered,
Find Step1Main.java a code error, try to turn off the partition settings, still the same.
Later mapper or reducer that is not executed, the Internet to find a long time did not correct the cause.
Finally, the reducer happened to read, some of the code is somehow altered . Login string is modified to step1, the string is modified to visit step2.
After it was modified back to normal program execution.
The idea is to be a bug, when the package renaming, the new packets of the same name will be in other Module1, java class can also move to the new package below. Later to pay attention.