老师请问下这个错误怎么解决，百度了好久也没办法

[WARN ] method:org.apache.hadoop.ipc.Client$Connection.updateAddress(Client.java:610)

Address change detected. Old: ADV4JT5C2J74Y6R/192.168.50.179:8020 New: ADV4JT5C2J74Y6R/192.168.139.1:8020

Exception in thread "main" java.net.ConnectException: Call From ADV4JT5C2J74Y6R/192.168.139.1 to ADV4JT5C2J74Y6R:8020 failed on connection exception: java.net.ConnectException: Connection refused: no further information; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791)

at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:731)

at org.apache.hadoop.ipc.Client.call(Client.java:1508)

at org.apache.hadoop.ipc.Client.call(Client.java:1441)

at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:230)

at com.sun.proxy.$Proxy10.getListing(Unknown Source)

at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getListing(ClientNamenodeProtocolTranslatorPB.java:590)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:258)

at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:104)

at com.sun.proxy.$Proxy11.getListing(Unknown Source)

at org.apache.hadoop.hdfs.DFSClient.listPaths(DFSClient.java:2146)

at org.apache.hadoop.hdfs.DistributedFileSystem$DirListingIterator.(DistributedFileSystem.java:900)

at org.apache.hadoop.hdfs.DistributedFileSystem$DirListingIterator.(DistributedFileSystem.java:883)

at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:828)

at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:824)

at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)

at org.apache.hadoop.hdfs.DistributedFileSystem.listLocatedStatus(DistributedFileSystem.java:824)

at org.apache.hadoop.fs.FileSystem.listLocatedStatus(FileSystem.java:1754)

at org.apache.hadoop.fs.FileSystem$5.(FileSystem.java:1879)

at org.apache.hadoop.fs.FileSystem.listFiles(FileSystem.java:1876)

at com.imooc.bigdata.hadoop.hdfs.HDFSWCApp01.main(HDFSWCApp01.java:36)

Caused by: java.net.ConnectException: Connection refused: no further information

at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)

at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)

at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:530)

at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494)

at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:648)

at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:744)

at org.apache.hadoop.ipc.Client$Connection.access$3000(Client.java:396)

at org.apache.hadoop.ipc.Client.getConnection(Client.java:1557)

at org.apache.hadoop.ipc.Client.call(Client.java:1480)

... 22 more

这是我/etc/hosts的设置，用的是windows上的虚拟机

在HDFS启动后，http://192.168.50.179:50070这个网站也无法访问，防火墙是关闭的