一、ORA-12514:TNS:监听程序当前无法识别连接描述符中请求的服务。
cd $ORACLE_HOME
cd network/admin
目录下listener.ora 文件配置不正确。
listener.ora应该配置如下：
# listener.ora Network Configuration File: /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.108)(PORT = 1521))
)
)
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBANAME = ORCL)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1)
(SID_NAME = ORCL)
)
)
二、ORA-01034:ORACLE not available
ORA-27101:shared memory realm does not exist
1.listener.ora中设置的关于ORACLE_HOME或ORACLE_SID的设置不正确。
检查ORACLE_HOME和ORACLES_SID，注意大小写。
2.或者是没有启动Oracle实例。
sqlplus “/as sysdba”
startup启动Oracle实例