./start-all.sh 无法启动报错如下小白刚想部署，请求大佬指点。

[qq_38791690]

This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
18/10/31 11:43:37 WARN hdfs.DFSUtilClient: Namenode for null remains unresolved for ID null. Check your hdfs-site.xml file to ensure namenodes are configured properly.
Starting namenodes on [master]
master: ssh: Could not resolve hostname master: Name or service not known
master: ssh: Could not resolve hostname master: Name or service not known
slaver3: ssh: Could not resolve hostname slaver3: Name or service not known
slaver4: ssh: Could not resolve hostname slaver4: Name or service not known
slaver2: ssh: Could not resolve hostname slaver2: Name or service not known
slaver5: ssh: Could not resolve hostname slaver5: Name or service not known
slaver1: ssh: Could not resolve hostname slaver1: Name or service not known
Starting secondary namenodes [master]
master: ssh: Could not resolve hostname master: Name or service not known
starting yarn daemons
starting resourcemanager, logging to /home/testliufeng/usr/local/hadoop/hadoop-2.8.5/logs/yarn-testliufeng-resourcemanager-VM_0_8_centos.out
master: ssh: Could not resolve hostname master: Name or service not known
slaver2: ssh: Could not resolve hostname slaver2: Name or service not known
slaver1: ssh: Could not resolve hostname slaver1: Name or service not known
slaver3: ssh: Could not resolve hostname slaver3: Name or service not known
slaver4: ssh: Could not resolve hostname slaver4: Name or service not known
slaver5: ssh: Could not resolve hostname slaver5: Name or service not known

[qq_38791690]

有没有大佬呀，看了也不知道哪里配置错误或缺失

[码太狼]

可能你的namenode配置有问题吧，可以参考https://blog.csdn.net/dante_003/article/details/54943774这个配置

[CydiaCat]

/etc/hosts里面的ip 主机名 和hadoop/etc里面slaves（版本不同可能是workers）里面填写的检查一下。

[To_Drill]

每一台机器的/etc/hosts文件中都要写上另外机器的IP地址的映射，然后配置下各台机器相互免密码登录，最后检查下yarn配置文件中的host是不是写错了

[SmallbenClock]

错误提示说这个命令不被支持，推荐用start-dfs.sh

[licjd]

建议从头开始检查一下，若无错，可以尝试百度教程

[星夜丶晚晚]

Check your hdfs-site.xml file to ensure namenodes are configured properly.

[lzw2016]

不知道你解决了没？我建议先看下ssh能否在namenode、datanode间免密通信，我感觉是主机名和ip的映射问题。其次，你应该把相关配置文件贴出来吧？信息太少，也不好判断。

[R_记忆犹新]

master和你的IP没有配置映射

[andylei]

检查下你的网络，然后确认下配置文件，提示是说主机没有连接上

[zj1776687]

你查看/etc/hosts/有没有IP映射
每个节点都要做
还有就是hadoop 里的work 文件要写上你所以节点的主机名

[樱花庄青山七海]

错误原因应该是主机名没有设置，和./start-all.sh没有关系，你的图片的前几行说的是这个指令过时了，但是过时还是可以用的，你的应该./start-yarn.sh 和./start-dfs.sh都不能用。

检查下hdfs-site.xml配置文件，可能是其中的主机名有误。