When the algorithm running at certain stage, when running the reduceBykey() function, It can lead to Executor Lost and Task lost, after several times. the application exit.
When this error occurred, the size of serialized task is bigger than 10MB, and the size become larger as the iteration increase.
the data generation file: https://gist.github.com/djvulee/7e3b2c9eb33ff0037622
the running code: https://gist.github.com/djvulee/6bf00e60885215e3bfd5