在Mac上用Navicat连接Oracle的时候总是提示：ORA-21561: OID generation failed
1.在终端上输入：$ hostname
localhost
2.查看/etc/hosts文件： $ cat /etc/hosts
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
127.0.0.1 activate.xmind.net
127.0.0.1 practivate.xmind.net
127.0.0.1 lm.licenses.xmind.net
127.0.0.1 lmlicenses.xmind.net
127.0.0.1 www.xmind.net
127.0.0.1 na1r.services.xmind.net
127.0.0.1 activate.xmind.net
127.0.0.1 practivate.xmind.net
127.0.0.1 lm.licenses.xmind.net
127.0.0.1 lmlicenses.xmind.net
127.0.0.1 www.xmind.net
127.0.0.1 na1r.services.xmind.net
0.0.0.0 account.jetbrains.com127.0.0.1 windows10.microdone.cn
3.保持hostname与hosts文件中127.0.0.1对应的名称一致即可！修改hostname命令
sudo scutil --set HostName yourname
