ORA-12500 to ORA-12699
ORA-12514, TNS:listener does not currently know of service requested in connect descriptor
数据库没有启动
https://community.oracle.com/thread/4041338
Post excerpt from alert_XE.log file that shows the database has been started & is now up & online ora-12514 ALWAYS only occurs due to a problem on DB Server system. One cause of this problem is when the Oracle database is down & needs to be started. A remote client send a request to the Listener asking to be connected to a specific service. If/when the listener does not know anything about that service, the listener responds with ora-12514 post results from the following two OS commands: lsnrctl status lsnrctl service Since every connection request to the listener gets logged, listener.log file will contain a line with 12514 as status code. This line contains valuable debugging details. So post this line & surrounding lines. for additional debugging suggestions read the URL below: http://edstevensdba.wordpress.com/2011/03/19/ora-12514/
- descriptor currently requested listener connectdescriptor currently requested listener descriptors connecting supported upstream descriptor operation permitted connect connection following the listener connected starting current client request multipart postman current connection scp subsystem request connection available tdengine request 错误connect request vscode descriptor