一：环境信息主机平台：linux6.2数据库版本：11.2.0.3（psu5）单实例二：问题现象lsnrctlstatus查看监听状态时发现没有监听文件（ListenerParameterFile，正常情
一：环境信息
主机平台：linux 6.2
数据库版本：11.2.0.3（psu5）单实例
二：问题现象
lsnrctl status查看监听状态时发现没有监听文件（Listener Parameter File，正常情况是会有监听文件信息的）
--注意因为问题库是商用库，不能把信息直接发出来。下面的内容是用测试环境模拟的
1.问题库的lsnrctl status信息
[oracle@localhost admin]$ lsnrctl status LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 15-APR-2014 17:47:28 Copyright (c) 1991, 2013, Oracle. All rights reserved. Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521)) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date 15-APR-2014 17:25:41 Uptime 0 days 0 hr. 21 min. 47 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Log File /u01/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521))) Services Summary... Service "ora11g" has 1 instance(s). Instance "ora11g", status READY, has 1 handler(s) for this service... The command completed successfully2. 正常库的lsnrctl status信息
[oracle@localhost admin]$ lsnrctl status LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 15-APR-2014 17:24:56 Copyright (c) 1991, 2013, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date 15-APR-2014 17:17:16 Uptime 0 days 0 hr. 7 min. 39 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/oracle/product/11.2.0.4/db_1/network/admin/listener.ora Listener Log File /u01/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Services Summary... Service "ora11g" has 1 instance(s). Instance "ora11g", status READY, has 1 handler(s) for this service... The command completed successfully--注意对比发现1,2的信息发现问题库的lsnrctl status信息中缺少“Listener Parameter File *****”这一行信息。 cd $ORACLE_HOME/network/admin 下发现确实没有listener.ora文件。这个问题到底是怎么出现的呢？查了MOS也没找到什么相关的信息。
三：故障模拟1
----个人猜测可能是listener.ora文件被别人误删了，所以决定从这个方面着手模拟
1. lsnrctl status（某个正常库，“Listener Parameter File”信息存在）
[oracle@localhost admin]$ lsnrctl status LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 15-APR-2014 17:24:56 Copyright (c) 1991, 2013, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date 15-APR-2014 17:17:16 Uptime 0 days 0 hr. 7 min. 39 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/oracle/product/11.2.0.4/db_1/network/admin/listener.ora Listener Log File /u01/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Services Summary... Service "ora11g" has 1 instance(s). Instance "ora11g", status READY, has 1 handler(s) for this service... The command completed successfully2. 删除listener.ora文件
cd $ORACLE_HOME/network/admin
mv listener.ora listener.ora.bak
3. lsnrctl status
--同第一步中lsnrctl status信息完全相同（删除以后信息还是正常的，可能是因为监听没有重启下面我们重启监听试试）
4.重启监听
1）lsnrctl stop
2）lsnrctl start
3）lsnrctl status
[oracle@localhost admin]$ lsnrctl status LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 15-APR-2014 17:47:28 Copyright (c) 1991, 2013, Oracle. All rights reserved. Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521)) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date 15-APR-2014 17:25:41 Uptime 0 days 0 hr. 21 min. 47 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Log File /u01/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521))) Services Summary... Service "ora11g" has 1 instance(s). Instance "ora11g", status READY, has 1 handler(s) for this service... The command completed successfully--问题现象重现，此时的监听信息中已没有了“Listener Parameter File”信息。
--可能大家会有疑问怎么没有listener.ora文件还能重启监听，这是因为我们用的是默认监听，，9i开始没有listener.ora也可以启动监听（默认监听）
5.还原listener.ora文件
1)mv listener.ora.bak listener.ora
2)lsnrctl status(还是没有“Listener Parameter File”信息)
3)重启监听
lsnrctl stop
lsnrctl start
4）lsnrctl status（出现“Listener Parameter File”信息）
--监听恢复正常
四：总结
9i开始不需要listener.ora文件即可启动默认监听（监听主机名所对应的ip地址的1521端口）
1）安装oracle软件（未建库）
2）启动监听（安装完oracle软件，未配置listener.ora）
