>>> 17/11/12 13:30:13 WARN AppClient$ClientEndpoint: Failed to connect to master
java.io.IOException: Failed to connect to 9864fc87660d/192.168.42.4:7077
        at org.apache.spark.network.client.TransportClientFactory.createClient(T
        at org.apache.spark.network.client.TransportClientFactory.createClient(T
        at org.apache.spark.rpc.netty.NettyRpcEnv.createClient(NettyRpcEnv.scala
        at org.apache.spark.rpc.netty.Outbox$$anon$1.call(Outbox.scala:187)
        at org.apache.spark.rpc.netty.Outbox$$anon$1.call(Outbox.scala:183)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: 9864fc87660d/192.168.4
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717
        at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocke
        at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConne
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.jav
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEve
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.ja
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
        at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThread
        ... 1 more

请问要如何处理呢？ 已经通过 ssh-copy-id shiyanlou@localhost添加了本地的ssh key 配置免密登录