-Dspark.broadcast.MasterHostAddress=127.0.0.1 -Dspark.broadcast.MasterTrackerPort=11111 -Dspark.broadcast.BlockSize=256 -Dspark.broadcast.MaxRetryCount=2 -Dspark.broadcast.TrackerSocketTimeout=50000 -Dspark.broadcast.ServerSocketTimout=10000 -Dspark.broadcast.MaxChatTime=500