错误

刚装了一个数据库，启动lsnrctl 报错:

[oracle@server1 ~]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 26-MAY-2019 07:34:15

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Starting /u01/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNS-12537: TNS:connection closed
 TNS-12560: TNS:protocol adapter error
  TNS-00507: Connection closed
   Linux Error: 29: Illegal seek

诊断

尝试使用tnslsnr确认

[oracle@server1 admin]$ tnslsnr
Unable to resolve address for localhost:6100
ONS runtime exiting

查看/ect/hosts 文件

[oracle@server1 admin]$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               server1.oracle.com server1 ★
::1             localhost6.localdomain6 localhost6

192.168.56.11  server1.oracle.com server1
192.168.56.12  server2.oracle.com server2

解决

原来是在修改/ect/hosts 文件时把127.0.0.1这一行给改错了。

[oracle@server1 admin]$ su - root
Password:
[root@server1 ~]# vi /etc/hosts
[root@server1 ~]# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1       localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6

192.168.56.11  server1.oracle.com server1
192.168.56.12  server2.oracle.com server2

再次启动成功。

[oracle@server1 admin]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 26-MAY-2019 07:44:40

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Starting /u01/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.3.0 - Production
System parameter file is /u01/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Log messages written to /u01/oracle/diag/tnslsnr/server1/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=server1.oracle.com)(PORT=1521)))

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date                26-MAY-2019 07:44:40
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File         /u01/oracle/diag/tnslsnr/server1/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=server1.oracle.com)(PORT=1521)))
The listener supports no services
The command completed successfully
[oracle@server1 admin]$

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