未能连接到主,在docker中的火花

我在下面的docker镜像上运行spark:

https://github.com/sequenceiq/docker-spark

我试图运行火花台( https://github.com/SparkTC/spark-bench )我试着下面的命令:

<SparkBench_Root>/KMean/bin/gen_data.sh 

我收到以下错误:

 Association with remote system [akka.tcp://sparkMaster@172.17.0.3:7077] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://sparkMaster@172.17.0.3:7077]] Caused by: [Connection refused: /172.17.0.3:7077] 16/03/16 08:00:36 WARN client.AppClient$ClientEndpoint: Failed to connect to master 172.17.0.3:7077 akka.actor.ActorNotFound: Actor not found for: ActorSelection[Anchor(akka.tcp://sparkMaster@172.17.0.3:7077/), Path(/user/Master)] at akka.actor.ActorSelection$$anonfun$resolveOne$1.apply(ActorSelection.scala 

谢谢Shuja