2023年8月1日发(作者：)

近日在配置Oracle 10G的流复制环境时，遇到一个问题，关闭数据库（shutdown immediate）后，通过SQL Plus连接数据库:conn sys/his@orc0 as sysdba，出现如下错误：

00 ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务00

通过重启服务的方式启动数据库，再次连接却能成功登录，也就是说在关闭数据库状态下无法连接服务器。00

开始以为是系统环境变量Oracle_SID的配置问题，因为机器有多个实例，一阵折腾后还是不能连接。后来查资料得知：00

Oracle9i以后，后台进程PMON自动在监听器中注册在系统参数SERVICE_NAMES中定义的服务名，SERVICE_NAMES默认为DB_NAME+DOMAIN_NAME。监听配置文件中可以不必指定监听的服务名。但是，当数据库处于关闭状态下PMON进程没有启动，也就不会自动注册监听的实例名，所以使用sqlplus sys/his@orc0 as sysdba 会出现ORA-12514错误。00

如果在文件中指定监听的实例名，则即使数据库处于关闭状态，仍然可以连接。00

00SID_LIST_LISTENER = (SID_LIST =0000

(SID_DESC =00 (SID_NAME = PLSExtProc)00 (ORACLE_HOME = G:oracleproduct10.2.0db_1) (PROGRAM = extproc) )

000000

(SID_DESC =00 (GLOBAL_DBNAME = ORCL)00 (ORACLE_HOME = G:oracleproduct10.2.0db_1)

(SID_NAME = ORCL) ) )

00

0000

00

LISTENER =00 (DESCRIPTION_LIST = (DESCRIPTION =0000

(ADDRESS = (PROTOCOL = TCP)(HOST = zyk)(PORT = 1521))00

) )

0000

以上粗体部件为增加的内容，修改后重启监听服务后即可。00

附：通过在lsnrctl中输入set display verbose，然后再通过命令service查看，服务状态为READY表示PMON自动注册的服务名，而UNKNOWN则表示该服务是手工在中配置的数据库服务。00

服务器莫名其妙的报这个错，之前一直正常，从google获取解决方案，解决之，记录如下：

1. Open the ""/network/admin/" file in the host,and you will

see:

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = PLSExtProc)

(ORACLE_HOME = D:oracleproduct10.2.0db_1)

(PROGRAM = extproc) )

)

2. Add the following lines after the 7th line in the above

(SID_DESC =

(GLOBAL_DBNAME = ORACLE)

(ORACLE_HOME = D:oracleproduct10.2.0db_1)

(SID_NAME = ORACLE)

)

3. At last the content of the file become to the following section:

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = PLSExtProc)

(ORACLE_HOME = D:oracleproduct10.2.0db_1)

(PROGRAM = extproc)

)

(SID_DESC =

(GLOBAL_DBNAME = ORACLE)

(ORACLE_HOME = D:oracleproduct10.2.0db_1)

(SID_NAME = ORACLE)

)

)

4. Save the file and restart the TNSListener service in the host. That's OK!

00

2023年8月1日发(作者：)

近日在配置Oracle 10G的流复制环境时，遇到一个问题，关闭数据库（shutdown immediate）后，通过SQL Plus连接数据库:conn sys/his@orc0 as sysdba，出现如下错误：

00 ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务00

通过重启服务的方式启动数据库，再次连接却能成功登录，也就是说在关闭数据库状态下无法连接服务器。00

开始以为是系统环境变量Oracle_SID的配置问题，因为机器有多个实例，一阵折腾后还是不能连接。后来查资料得知：00

Oracle9i以后，后台进程PMON自动在监听器中注册在系统参数SERVICE_NAMES中定义的服务名，SERVICE_NAMES默认为DB_NAME+DOMAIN_NAME。监听配置文件中可以不必指定监听的服务名。但是，当数据库处于关闭状态下PMON进程没有启动，也就不会自动注册监听的实例名，所以使用sqlplus sys/his@orc0 as sysdba 会出现ORA-12514错误。00

如果在文件中指定监听的实例名，则即使数据库处于关闭状态，仍然可以连接。00

00SID_LIST_LISTENER = (SID_LIST =0000

(SID_DESC =00 (SID_NAME = PLSExtProc)00 (ORACLE_HOME = G:oracleproduct10.2.0db_1) (PROGRAM = extproc) )

000000

(SID_DESC =00 (GLOBAL_DBNAME = ORCL)00 (ORACLE_HOME = G:oracleproduct10.2.0db_1)

(SID_NAME = ORCL) ) )

00

0000

00

LISTENER =00 (DESCRIPTION_LIST = (DESCRIPTION =0000

(ADDRESS = (PROTOCOL = TCP)(HOST = zyk)(PORT = 1521))00

) )

0000

以上粗体部件为增加的内容，修改后重启监听服务后即可。00

附：通过在lsnrctl中输入set display verbose，然后再通过命令service查看，服务状态为READY表示PMON自动注册的服务名，而UNKNOWN则表示该服务是手工在中配置的数据库服务。00

服务器莫名其妙的报这个错，之前一直正常，从google获取解决方案，解决之，记录如下：

1. Open the ""/network/admin/" file in the host,and you will

see:

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = PLSExtProc)

(ORACLE_HOME = D:oracleproduct10.2.0db_1)

(PROGRAM = extproc) )

)

2. Add the following lines after the 7th line in the above

(SID_DESC =

(GLOBAL_DBNAME = ORACLE)

(ORACLE_HOME = D:oracleproduct10.2.0db_1)

(SID_NAME = ORACLE)

)

3. At last the content of the file become to the following section:

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = PLSExtProc)

(ORACLE_HOME = D:oracleproduct10.2.0db_1)

(PROGRAM = extproc)

)

(SID_DESC =

(GLOBAL_DBNAME = ORACLE)

(ORACLE_HOME = D:oracleproduct10.2.0db_1)

(SID_NAME = ORACLE)

)

)

4. Save the file and restart the TNSListener service in the host. That's OK!

00