【小错误】监听

今天在配置监听后状态一直显示The listener supports no services，

解决办法：

①登录到数据库，查看数据库service_names

SQL> show parameter service_names

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
service_names                        string      ORA11GR2

②强制注册服务

SQL> alter system register;

System altered.

③再次查看监听状态

[oracle@host05 ~]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 22-NOV-2016 16:25:51

Copyright (c) 1991, 2013, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=host05)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date                22-NOV-2016 16:15:29
Uptime                    0 days 0 hr. 10 min. 22 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/host05/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=host05)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Services Summary...
Service "ORA11GR2" has 1 instance(s).
  Instance "ORA11GR2", status READY, has 1 handler(s) for this service...
Service "ORA11GR2XDB" has 1 instance(s).
  Instance "ORA11GR2", status READY, has 1 handler(s) for this service...
The command completed successfully