1 场景

sqlplus 连接oracle 数据库提示如下错误：

sqlplus 连接cdb 提示无法识别连接的描述符

[oracle@www.cndba.cn admin]$ sqlplus system/oracle@cndba

SQL*Plus: Release 18.0.0.0.0 Production on Tue Jun 19 13:54:22 2018

Version 18.1.0.0.0

Copyright (c) 1982, 2017, Oracle. All rights reserved.

ERROR:

ORA-12514: TNS:listener does not currently know of service requested in connect

descriptor

2 查看监听状态，判断是否是监听的问题

[oracle@www.cndba.cn admin]$ lsnrctl status

LSNRCTL for Linux: Version 18.0.0.0.0 - Production on 19-JUN-2018 13:58:14

Copyright (c) 1991, 2017, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=host1)(PORT=1521)))

STATUS of the LISTENER

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

Alias LISTENER

Version TNSLSNR for Linux: Version 18.0.0.0.0 - Production

Start Date 19-JUN-2018 09:39:15

Uptime 0 days 4 hr. 18 min. 58 sec

Trace Level off

Security ON: Local OS Authentication

SNMP OFF

Listener Parameter File /u01/app/oracle/product/18.1.0/dbhome_1/network/admin/listener.ora

Listener Log File /u01/app/oracle/diag/tnslsnr/host1/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=host1)(PORT=1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

The listener supports no services

The command completed successfully

从中可以看出监听正常，但是The listener supports no services这个是不识别service_name

3 查看参数

SQL> show parameter name

NAME TYPE VALUE

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

cdb_cluster_name string

cell_offloadgroup_name string

db_file_name_convert string

db_name string cndba

db_unique_name string cndba

global_names boolean FALSE

instance_name string cndba

lock_name_space string

log_file_name_convert string

pdb_file_name_convert string

processor_group_name string

NAME TYPE VALUE

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

service_names string cndba

4 正确的配置方法

4.1 在listener.ora文件里面添加SID_LIST_LISTENER

[oracle@www.cndba.cn admin]$ cd /u01/app/oracle/product/18.1.0/dbhome_1/network/admin

[oracle@www.cndba.cn admin]$ cat listener.ora

# listener.ora Network Configuration File: /u01/app/oracle/product/18.1.0/dbhome_1/network/admin/listener.ora

# Generated by Oracle configuration tools.

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(GLOBAL_DBNAME = cndba)--db_unique_name

(ORACLE_HOME = /u01/app/oracle/product/18.1.0/dbhome_1)

(SID_NAME = cndba)--instance_name

)

(SID_DESC =

(GLOBAL_DBNAME = pdbcndba)--pdbname

(ORACLE_HOME = /u01/app/oracle/product/18.1.0/dbhome_1)

(SID_NAME = cndba)--instance_name

)

)

重启listener服务

[oracle@www.cndba.cn admin]$ lsnrctl start

LSNRCTL for Linux: Version 18.0.0.0.0 - Production on 19-JUN-2018 14:29:27

Copyright (c) 1991, 2017, Oracle. All rights reserved.

Starting /u01/app/oracle/product/18.1.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 18.0.0.0.0 - Production

System parameter file is /u01/app/oracle/product/18.1.0/dbhome_1/network/admin/listener.ora

Log messages written to /u01/app/oracle/diag/tnslsnr/host1/listener/alert/log.xml

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=host1)(PORT=1521)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=host1)(PORT=1521)))

STATUS of the LISTENER

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

Alias LISTENER

Version TNSLSNR for Linux: Version 18.0.0.0.0 - Production

Start Date 19-JUN-2018 14:29:27

Uptime 0 days 0 hr. 0 min. 0 sec

Trace Level off

Security ON: Local OS Authentication

SNMP OFF

Listener Parameter File /u01/app/oracle/product/18.1.0/dbhome_1/network/admin/listener.ora

Listener Log File /u01/app/oracle/diag/tnslsnr/host1/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=host1)(PORT=1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

Services Summary...

Service "cndba" has 1 instance(s).

Instance "cndba", status UNKNOWN, has 1 handler(s) for this service...

Service "pdbcndba" has 1 instance(s).

Instance "cndba", status UNKNOWN, has 1 handler(s) for this service...

The command completed successfully

4.2 修改tnsnames.ora，添加以下内容

[oracle@www.cndba.cn admin]$ cd /u01/app/oracle/product/18.1.0/dbhome_1/network/admin

[oracle@www.cndba.cn admin]$ cat tnsnames.ora

tnsnames.ora 添加以下内容

CNDBA =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = host1)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = cndba)

)

)

pdbcndba =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = host1)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = pdbcndba)-- pdbname

)

)

5 测试连接是否成功

5.1 SQLPLUS连接CDB

[oracle@www.cndba.cn admin]$ sqlplus sys/oracle@cndba as sysdba

SQL*Plus: Release 18.0.0.0.0 Production on Tue Jun 19 14:15:42 2018

Version 18.1.0.0.0

Copyright (c) 1982, 2017, Oracle. All rights reserved.

Connected to:

Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production

Version 18.1.0.0.0

SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED

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

2 PDB$SEED READ ONLY NO

4 PDBCNDBA READ WRITE NO

5.2 SQLPLUS连接PDB

[oracle@www.cndba.cn admin]$ sqlplus sys/oracle@pdbcndba as sysdba

SQL*Plus: Release 18.0.0.0.0 Production on Tue Jun 19 14:15:53 2018

Version 18.1.0.0.0

Copyright (c) 1982, 2017, Oracle. All rights reserved.

Connected to:

Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production

Version 18.1.0.0.0

SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED

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

4 PDBCNDBA READ WRITE NO

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https://www.cndba.cn/leo1990/article/2872

https://www.cndba.cn/leo1990/article/2872

https://www.cndba.cn/leo1990/article/2872

https://www.cndba.cn/leo1990/article/2872

https://www.cndba.cn/leo1990/article/2872

https://www.cndba.cn/leo1990/article/2872

https://www.cndba.cn/leo1990/article/2872

https://www.cndba.cn/leo1990/article/2872

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