1，登录报错如下：
[oracle@oracle_yueworld admin]$ rlwrap sqlplus system/system51@st1SQL*Plus: Release 11.2.0.1.0 Production on Thu Dec 3 16:33:26 2015 Copyright (c) 1982, 2009, Oracle. All rights reserved. ERROR: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
2，查看下lsnrctl状态，看是否是lsnrctl监听的问题
[oracle@oracle_yueworld admin]$ lsnrctl statusLSNRCTL for Linux: Version 11.2.0.1.0 - Production on 03-DEC-2015 17:03:07 Copyright (c) 1991, 2009, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.121.51)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 03-DEC-2015 17:02:55 Uptime 0 days 0 hr. 0 min. 11 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Listener Log File /oracle/app/oracle/diag/tnslsnr/oracle_yueworld/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.121.51)(PORT=1521))) The listener supports no services The command completed successfully [oracle@oracle_yueworld admin]$ [oracle@oracle_yueworld admin]$
从中可以看出监听正常，但是The listener supports no services这个貌似是不识别service_name啊
原blog地址：
，未经过运行，不得转载3，去查看下参数
SQL> show parameter name;NAME TYPE VALUE------------------------------------ ----------- ------------------------------db_file_name_convert string /oracle/app/oracle/oradata/pow erdes, /oracle/app/oracle/orad ata/orcldb_name string orcldb_unique_name string stunq global_names boolean FALSE instance_name string orcl lock_name_space string log_file_name_convert string service_names string stunq SQL>
看到db_name和db_unique_name以及service_names不一样
4，解决方案
在listener.ora文件里面添加SID_LIST_LISTENER，如下所示：
作用：以下红色的模块是静态注册监听服务，方便客户端远程连接该数据库使用
[oracle@oracle_yueworld admin]$ more listener.ora # listener.ora Network Configuration File: /oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora# Generated by Oracle configuration tools.SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = stunq) (ORACLE_HOME = /oracle/app/oracle/product/11.2.0/dbhome_1) (SID_NAME = stunq) ) )LISTENER = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.51)(PORT = 1521)) )ADR_BASE_LISTENER = /oracle/app/oracle [oracle@oracle_yueworld admin]$
再重启lsnrctl服务:
[oracle@oracle_yueworld admin]$ lsnrctl startLSNRCTL for Linux: Version 11.2.0.1.0 - Production on 03-DEC-2015 18:00:09 Copyright (c) 1991, 2009, Oracle. All rights reserved. Starting /oracle/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.1.0 - Production System parameter file is /oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Log messages written to /oracle/app/oracle/diag/tnslsnr/oracle_yueworld/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.121.51)(PORT=1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.121.51)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 03-DEC-2015 18:00:09 Uptime 0 days 0 hr. 0 min. 0 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Listener Log File /oracle/app/oracle/diag/tnslsnr/oracle_yueworld/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.121.51)(PORT=1521))) Services Summary... Service "stunq" has 1 instance(s). Instance "stunq", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully [oracle@oracle_yueworld admin]$
看到The listener supports no services错误已经没有了，可以去试试登录
5，再次登录报错
[oracle@oracle_yueworld admin]$ rlwrap sqlplus orclk/st141118@st1SQL*Plus: Release 11.2.0.1.0 Production on Thu Dec 3 18:03:55 2015 Copyright (c) 1982, 2009, Oracle. All rights reserved. ERROR: ORA-01034: ORACLE not available ORA-27101: shared memory realm does not exist Linux-x86_64 Error: 2: No such file or directory Process ID: 0 Session ID: 0 Serial number: 0 Enter user-name:
6，去修改服务端和客户端的配置文件
google了很多资料，大部分都说是listener.ora配置错误导致listener找不到你要请求的sid。这有两种可能，一种是client端的tnsnames.ora中配置了错误的SID，一种是server端的listener.ora中配置错了SID。仔细检查，然后开始修改服务器listener.ora listener.ora，将SID_NAME修改成正确的instance_name为orcl
[oracle@oracle_yueworld admin]$ more listener.ora # listener.ora Network Configuration File: /oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora# Generated by Oracle configuration tools.SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = stunq) (ORACLE_HOME = /oracle/app/oracle/product/11.2.0/dbhome_1) (SID_NAME = orcl) ) ) #PS: 这里面的SID_NAME是oracle实例名，GLOBAL_DBNAME是全局的dbname，是db_unique_nameLISTENER = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.51)(PORT = 1521)) ) ADR_BASE_LISTENER = /oracle/app/oracle [oracle@oracle_yueworld admin]$
修改客户端tnsnames.ora
[oracle@oracle_yueworld admin]$ vim tnsnames.ora # tnsnames.ora Network Configuration File: /oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora# Generated by Oracle configuration tools.st1 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.51)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = stunq) ) ) # PS：这里的service_name就是可以从执行 show parameter name;中显示的service_names参数值。
7，然后验证登录，成功了，如下所示：
[oracle@oracle_yueworld admin]$ [oracle@oracle_yueworld admin]$ rlwrap sqlplus orclk/st141118@st1SQL*Plus: Release 11.2.0.1.0 Production on Thu Dec 3 19:43:10 2015 Copyright (c) 1982, 2009, Oracle. All rights reserved. Connected to: Oracle Database 11g Release 11.2.0.1.0 - 64bit Production SQL>