我正在使用Spark Standalone Mode教程页面以独立模式安装Spark。

1-我已经通过以下方式开始了硕士课程：

./sbin/start-master.sh

2-我是通过以下方式开始工作的：

./bin/spark-class org.apache.spark.deploy.worker.Worker spark://ubuntu:7077

注意：spark://ubuntu:7077是我的主名，我可以在中看到它Master-WebUI。

问题：通过第二条命令，工作人员成功启动。但是它不能与主人联系。它反复尝试，然后给出以下消息：

15/02/08 11:30:04 WARN Remoting: Tried to associate with unreachable    remote address [akka.tcp://sparkMaster@ubuntu:7077]. Address is now gated for 5000 ms, all messages to this address will be delivered to dead letters. Reason: Connection refused: ubuntu/127.0.1.1:7077
15/02/08 11:30:04 INFO RemoteActorRefProvider$RemoteDeadLetterActorRef: Message [org.apache.spark.deploy.DeployMessages$RegisterWorker] from Actor[akka://sparkWorker/user/Worker#-1296628173] to Actor[akka://sparkWorker/deadLetters] was not delivered. [20] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.
15/02/08 11:31:15 ERROR Worker: All masters are unresponsive! Giving up.

问题是什么？

谢谢