linux下提示找不到主机异常

linux下提示找不到主机异常
com.mchange.v2.c3p0.impl.C3P0ImplUtils  - Failed to get local InetAddress for VMID.
This is unlikely to matter. At all. We'll add some extra randomness
java.net.UnknownHostException: v-dxt-guankong1: gymf

于是，先去看主机在什么位置定义的：
cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=gymf

然后，修改host文件
vi /etc/hosts 在行127.0.0.1 localhost localhost.localdomain 后加上gymf保存即可。