Buid Kylin Cube from Streaming

[????]

Hi all??
      i follow the steps to build kylin cube from streaming  as the website 
http://kylin.apache.org/docs15/tutorial/cube_streaming.html says
      but error happens :
          
2016-08-15 17:32:49,484 WARN  [main StreamingCLI:130]: invalid args:streaming 
start storm_cube 1471253400000_1471253700000 -start 1471253400000 -end 
1471253700000 -cube storm_cube
2016-08-15 17:32:49,484 ERROR [main StreamingCLI:106]: error start streaming
java.lang.NullPointerException
        at 
org.apache.kylin.source.kafka.KafkaStreamingInput.getBatchWithTimeWindow(KafkaStreamingInput.java:79)
        at 
org.apache.kylin.engine.streaming.OneOffStreamingBuilder$1.run(OneOffStreamingBuilder.java:75)
        at 
org.apache.kylin.engine.streaming.cli.StreamingCLI.startOneOffCubeStreaming(StreamingCLI.java:126)
        at 
org.apache.kylin.engine.streaming.cli.StreamingCLI.main(StreamingCLI.java:100)



and the kafka send message like this
{"amount":98.19556885514385,"category":"Other","order_time":1471254400537,"device":"Windows","qty":4,"currency":"USD","country":"JAPAN"}


hope to get help


thanks!