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2023年12月19日发(作者:python 正则表达式 提取数字)

在ORACLE测试服务器上还原恢复了一个数据库后,启动监听服务时出现了TNS-12541, TNS-12560,TNS-00511之类的错误,具体情况如下所示:

[oracle@getlnx01 admin]$ lsnrctl status

LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 09-MAR-2015 09:13:29

Copyright (c) 1991, 2007, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))

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=TCP)(HOST=)(PORT=1521)))

TNS-12541: TNS:no listener

TNS-12560: TNS:protocol adapter error

TNS-00511: No listener

Linux Error: 111: Connection refused

[oracle@getlnx01 dbs]$ lsnrctl start

LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 09-MAR-2015 09:20:46

Copyright (c) 1991, 2007, Oracle. All rights reserved.

Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr:

TNSLSNR for Linux: Version 10.2.0.4.0 - Production

System parameter file is /u01/app/oracle/product/10.2.0/db_1/network/admin/

Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))

Listening on:

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))

TNS-12547: TNS:lost contact

TNS-12560: TNS:protocol adapter error

TNS-00517: Lost contact

Linux Error: 104: Connection reset by peer

Connecting to

(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=)(PORT=1521)))

TNS-12541: TNS:no listener

TNS-12560: TNS:protocol adapter error

TNS-00511: No listener

Linux Error: 111: Connection refused

因为曾经遇到并解决过TNS-12541这类错误,立即检查/etc/hosts文件,结果发现IP地址写错了,正确的IP地址应该为192.168.7.221,而不是粗心手误写错的192.168.7.211

[root@getlnx01 ~]# more /etc/hosts

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1 getlnx01

192.168.7.211 getlnx01

修改为正确的IP地址后,依然出现这个错误,后面查看了官方文档Starting TNS Listener

or LSNRCTL Start Yields TNS-12541, Linux Error: 111: Connection Refused (文档 ID 343295.1)后,才发现是因为本地主机环回名称和地址不正确所致,修改/etc/hosts后,重启监听服务,问题解决。

[oracle@getlnx01 ~]$ more /etc/hosts

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1 omain localhost

192.168.7.221 getlnx01

CAUSE

1. There is possibly an incorrect IP Address specified for the host in the /etc/hosts file.

For example:

192.168.101.101 prod1

Whereas the actual ip address for the host "" is 192.168.101.110

2. Also, the localhost reference may be incorrect or missing from the /etc/hosts file.

3. Oracle may not have read access to /etc/ file.

SOLUTION

To implement the solution, please execute the following steps:

1. Correct the mapping in the /etc/hosts file by adding/correcting the IP address and/or

hostname reference for the Unix/Linux Server (both long and short host names).

For example:

# Add or edit the /etc/hosts file to include a valid entry for the Server:

192.168.101.110 prod1

2. Check that the localhost loopback name and address are correct (both long and short host

names).

An example of a correct localhost entry would be as follows:

127.0.0.1 omain localhost

3. Remember to save the /etc/hosts file and then start the listener.

4. Check permissions on /etc/ file to ensure group and other have read access.

- If necessary change permisions on /etc/ as follows:

chmod 644 /etc/

更多信息请查看IT技术专栏


本文标签: 查看 IP地址 监听 服务