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今天在启动 Hadoop 时遇到 Name or service not knownstname 这样的错误
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。
解决方法：删除掉 slaves 文件，重新建立一个 slaves 文件，并配置好就可以了。
[root@master sbin]# ./start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
Starting namenodes on [master]
The authenticity of host ‘master (10.0.0.110)’ can’t be established.
RSA key fingerprint is 90:b6:9e:d0:3e:76:27:ce:34:3b:d6:b4:41:5d:e7:31.
Are you sure you want to continue connecting (yes/no)? yes
master: Warning: Permanently added ‘master,10.0.0.110’ (RSA) to the list of known hosts.
master: starting namenode, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/hadoop-root-namenode-master.out
slaver1: starting datanode, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/hadoop-root-datanode-slaver1.out
slaver2: starting datanode, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/hadoop-root-datanode-slaver2.out
master: starting datanode, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/hadoop-root-datanode-master.out
starting yarn daemons
starting resourcemanager, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/yarn-root-resourcemanager-master.out
slaver2: starting nodemanager, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/yarn-root-nodemanager-slaver2.out
slaver1: starting nodemanager, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/yarn-root-nodemanager-slaver1.out
master: starting nodemanager, logging to /opt/hadoop_resources/hadoop-2.7.0/logs/yarn-root-nodemanager-master.out
[root@master sbin]# jps
1926 ResourceManager
1597 NameNode
2020 NodeManager
2054 Jps
1688 DataNode
下面关于 Hadoop 的文章您也可能喜欢，不妨看看：
Ubuntu14.04 下 Hadoop2.4.1 单机 / 伪分布式安装配置教程 http://www.linuxidc.com/Linux/2015-02/113487.htm
CentOS 安装和配置 Hadoop2.2.0 http://www.linuxidc.com/Linux/2014-01/94685.htm
Ubuntu 14.04 LTS 下安装 Hadoop 1.2.1（伪分布模式）http://www.linuxidc.com/Linux/2016-09/135406.htm
Ubuntu 上搭建 Hadoop 环境（单机模式 + 伪分布模式）http://www.linuxidc.com/Linux/2013-01/77681.htm
Ubuntu 下 Hadoop 环境的配置 http://www.linuxidc.com/Linux/2012-11/74539.htm
单机版搭建 Hadoop 环境图文教程详解 http://www.linuxidc.com/Linux/2012-02/53927.htm
Hadoop 2.6.0 HA 高可用集群配置详解 http://www.linuxidc.com/Linux/2016-08/134180.htm
Spark 1.5、Hadoop 2.7 集群环境搭建 http://www.linuxidc.com/Linux/2016-09/135067.htm
更多 Hadoop 相关信息见Hadoop 专题页面 http://www.linuxidc.com/topicnews.aspx?tid=13
本文永久更新链接地址：http://www.linuxidc.com/Linux/2016-10/136514.htm
