linux: 未知的名称或服务 Caused by: java.net.UnknownHostException: smn01: Name or service not known

liuhehe321

于 2018-11-18 09:57:12 发布

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本文解决了一个常见的网络编程问题，即UnknownHostException，通过编辑/etc/hosts文件并添加特定的IP地址和主机名映射，成功地解决了Java应用程序无法识别特定主机名的问题。

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报错问题：
Caused by: java.net.UnknownHostException: smn01: Name or service not known
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
at java.net.InetAddress.getLocalHost(InetAddress.java:1500)
... 70 common frames omitted

解决方案：

vim /etc/hosts

添加后，

解决了问题： 10.98.161.32 smn01

127.0.0.1       localhost
10.98.161.32    smn01
# special IPv6 addresses
::1             localhost ipv6-localhost ipv6-loopback

fe00::0         ipv6-localnet

ff00::0         ipv6-mcastprefix
ff02::1         ipv6-allnodes
ff02::2         ipv6-allrouters
ff02::3         ipv6-allhosts