关于#hadoop#的启动问题，如何解决？

Question

[root@node1 sbin]# ./start-dfs.sh
Starting namenodes on [node1]
node1: starting namenode, logging to /usr/local/hadoop-2.7.4/logs/hadoop-root-namenode-node1.out
node3: starting datanode, logging to /usr/local/hadoop-2.7.4/logs/hadoop-root-datanode-node3.out
node4: starting datanode, logging to /usr/local/hadoop-2.7.4/logs/hadoop-root-datanode-node4.out
node5: starting datanode, logging to /usr/local/hadoop-2.7.4/logs/hadoop-root-datanode-node5.out
node2: starting datanode, logging to /usr/local/hadoop-2.7.4/logs/hadoop-root-datanode-node2.out
Starting secondary namenodes [master]
master: ssh: Could not resolve hostname master: Name or service not known
[root@node1 sbin]# ./start-yarn.sh
starting yarn daemons
starting resourcemanager, logging to /usr/local/hadoop-2.7.4/logs/yarn-root-resourcemanager-node1.out
node4: starting nodemanager, logging to /usr/local/hadoop-2.7.4/logs/yarn-root-nodemanager-node4.out
node3: starting nodemanager, logging to /usr/local/hadoop-2.7.4/logs/yarn-root-nodemanager-node3.out
node5: starting nodemanager, logging to /usr/local/hadoop-2.7.4/logs/yarn-root-nodemanager-node5.out
node2: starting nodemanager, logging to /usr/local/hadoop-2.7.4/logs/yarn-root-nodemanager-node2.out
[root@node1 sbin]# ./mr-jobhistory-daemon.sh start historyserver
starting historyserver, logging to /usr/local/hadoop-2.7.4/logs/mapred-root-historyserver-node1.out
[root@node1 sbin]# jps
1948 Jps
1484 NameNode
[root@node1 sbin]# jps
1958 Jps
1484 NameNode
[root@node1 sbin]#

Answer 1

报错提示

Starting secondary namenodes [master]
master: ssh: Could not resolve hostname master: Name or service not known

原因
主机名尚未添加导致的

---

解决方法
在每台服务器修改添加主机名
如：

vim /etc/hosts

Then add you ip and the name of the host

192.168.0.2     master
192.168.0.3     node1
192.168.0.5     node2

如有问题及时沟通。