1.检查数据库状态

[oracle@szdb product]$ sqlplus /nolog

SQL*Plus: Release 19.0.0.0.0 - Production on Fri Oct 29 14:48:12 2021

Version 19.12.0.0.0

Copyright (c) 1982, 2021, Oracle.  All rights reserved.

SQL> conn / as sysdba

Connected.

SQL> SELECT name,open_mode from v$database;

NAME      OPEN_MODE

--------- --------------------

EMREP     READ WRITE

SQL>

2.查看监听服务：

[oracle@szdb product]$ lsnrctl status

LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 29-OCT-2021 14:49:45

Copyright (c) 1991, 2021, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=szdb)(PORT=1521)))

STATUS of the LISTENER

------------------------

Alias                     LISTENER

Version                   TNSLSNR for Linux: Version 19.0.0.0.0 - Production

Start Date                29-OCT-2021 14:31:53

Uptime                    0 days 0 hr. 17 min. 51 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /u01/app/oracle/product/19.12.0/db_1/network/admin/listener.ora

Listener Log File         /u01/app/oracle/diag/tnslsnr/szdb/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=szdb)(PORT=1521)))

The listener supports no services

The command completed successfully

[oracle@szdb product]$

没有任何服务

默认动态注册服务。

3. 查看local_listener参数

SQL> show parameter local_listener

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

local_listener                       string      LISTENER_EMREP

SQL>

4.确认TNSNAMES.ORA中存在连接串

[oracle@szdb admin]$ pwd

/u01/app/oracle/product/19.12.0/db_1/network/admin

[oracle@szdb admin]$

[oracle@szdb admin]$

[oracle@szdb admin]$ grep -i listener_ tnsnames.ora

LISTENER_ORCLCDB =

不存在

5.修改LOCAL_LISTENER，去掉

SQL> alter system set local_listener='';

System altered.

--马上注册一下

SQL> alter system register;

System altered.

6.重新验证

[oracle@szdb product]$ lsnrctl status

LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 29-OCT-2021 15:01:09

Copyright (c) 1991, 2021, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=szdb)(PORT=1521)))

STATUS of the LISTENER

------------------------

Alias                     LISTENER

Version                   TNSLSNR for Linux: Version 19.0.0.0.0 - Production

Start Date                29-OCT-2021 14:31:53

Uptime                    0 days 0 hr. 29 min. 15 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /u01/app/oracle/product/19.12.0/db_1/network/admin/listener.ora

Listener Log File         /u01/app/oracle/diag/tnslsnr/szdb/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=szdb)(PORT=1521)))

Services Summary...

Service "emrep" has 1 instance(s).

Instance "emrep", status READY, has 1 handler(s) for this service...

Service "emrepXDB" has 1 instance(s).

Instance "emrep", status READY, has 1 handler(s) for this service...

The command completed successfully

[oracle@szdb product]$

已经OK.