ora-12514 listener is currently not recognized
用PL/SQL连接虚拟机中的Oracle数据库,发现又报了“ORA-12514 TNS 监听程序当前无法识别连接描述符中请求服务”错误,帮其解决后,发现很多人遇到过这样的问题,因此写着这里。
把Oracle安装在虚拟机中,而且Oracle安装完毕后,没在进行任何监听的配置,则虚拟机再启动,则就会出现ORA-12514的问题。
如下是解决思路:(推荐学习:MySQL视频教程)
根据出错信息判断出客户端未监听到实例服务名
1、通过重启服务的方式启动数据库,再次连接仍无法连接服务器。
2、既然第一种方法不能解决问题,那就第二种方法。考虑监听listener.ora
监听配置文件listener.ora中可以不必指定监听的服务名(安装Oracle10g后也是没有指定的)。正常情况下一般只要数据库启动,客户端连接数据库也没有什么问题,但是有时重复启动关闭也会出现ORA-12514错误。
既然listener.ora中没有指定监听,我们可以在listener.ora文件中指定监听的实例名,这样该问题应该可以连接。
找到查看listener.ora文件:位于oracle 安装目录的app文件夹目录下面
完整代码
# listener.ora Network Configuration File: G:\app\admin\product\12.1.0\dbhome_1\NETWORK\ADMIN\listener.ora # Generated by Oracle configuration tools. SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = CLRExtProc) (ORACLE_HOME = G:\app\admin\product\12.1.0\dbhome_1) (PROGRAM = extproc) ) #添加内容为: (SID_DESC = (GLOBAL_DBNAME = ORCL) (ORACLE_HOME = G:\app\admin\product\12.1.0\dbhome_1) (SID_NAME = ORCL) ) ) #=================== LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.0.217)(PORT = 1521)) ) (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1)) ) ) ADR_BASE_LISTENER = G:\app\admin\product\12.1.0\dbhome_1\log
SID_NAME 对应网络服务命名;GLOBAL_DBNAME 对应服务名,修改完成后重启服务就好了!
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