Oracle监听能正常启动，但实例监听不到故障应急处理一例
故障现象：监听能正常启动，但两个实例均未能监听到
[Oracle@L-DB-100-17 ~]$ lsnrctl status
LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 07-1月 -2002 14:29:33
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.100.17)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Start Date 07-1月 -2002 14:03:45
Uptime 0 days 0 hr. 25 min. 47 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File /u01/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.16.100.17)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
故障处理：
1、修改HOST地址
[oracle@L-DB-100-17 admin]$ vi listener.ora
修改IP地址为0.0.0.0,"HOST=0.0.0.0"
2、重启lsnrclt
[oracle@L-DB-100-17 admin]$ lsnrctl stop
LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 07-1月 -2002 14:31:24
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=0.0.0.0)(PORT=1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC0)))
The command completed successfully
[oracle@L-DB-100-17 admin]$ lsnrctl start
LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 07-1月 -2002 14:31:37
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Starting /u01/product/10.2.0/db_1/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 10.2.0.4.0 - Production
System parameter file is /u01/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /u01/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=0.0.0.0)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Start Date 07-1月 -2002 14:31:37
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File /u01/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully