Oracle：Instance “PLSExtProc“, status UNKNOWN, has 1 handler(s) for this service

解决方式：oracle用户下
1.登录

sqlplus / as sysdba

2.修改local_listener参数

sql> alter system set local_listener='';

3,再重新注册服务

sql> alter system register;

4.退出

sql>exit;

5.查看注册情况，$ lsnrctl status 服务状态是否reday