啟動Hadoop時遇到Name or service not knownstname 錯誤

今天在啟動Hadoop時遇到Name or service not knownstname這樣的錯誤

1 : Name or service not knownstname master  
2 : Name or service not knownstname slaver1  
3 : Name or service not knownstname slaver2

原因：slaves文件可能被污染了。

解決方法：刪除掉slaves文件，重新建立一個slaves文件，並配置好就可以了。

 1 [root@master sbin]# ./start-all.sh 
 2 This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
 3 Starting namenodes on [master]
 4 The authenticity of host 'master (10.0.0.110)' can't be established.
 5 RSA key fingerprint is 90:b6:9e:d0:3e:76:27:ce:34:3b:d6:b4:41:5d:e7:31.
 6 Are you sure you want to continue connecting (yes/no)? yes
 7 master: Warning: Permanently added 'master,10.0.0.110' (RSA) to the list of known hosts.
 8 master: starting namenode, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/hadoop-root-namenode-master.out
 9 slaver1: starting datanode, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/hadoop-root-datanode-slaver1.out
10 slaver2: starting datanode, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/hadoop-root-datanode-slaver2.out
11 master: starting datanode, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/hadoop-root-datanode-master.out
12 starting yarn daemons
13 starting resourcemanager, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/yarn-root-resourcemanager-master.out
14 slaver2: starting nodemanager, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/yarn-root-nodemanager-slaver2.out
15 slaver1: starting nodemanager, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/yarn-root-nodemanager-slaver1.out
16 master: starting nodemanager, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/yarn-root-nodemanager-master.out
17 [root@master sbin]# jps
18 1926 ResourceManager
19 1597 NameNode
20 2020 NodeManager
21 2054 Jps
22 1688 DataNode