公司服務器周末要加硬盤，周一來后應用連不上了。報錯如下 報錯： ORA-12170:TNS connect timeout occurred
第一反應是監聽沒開：
1. 測試了一下， 連接超時沒用ping 通
C:\Users\Administrator>tnsping brorcl
TNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 15-6月 -2015 09:45:43
Copyright (c) 1997, 2010, Oracle. All rights reserved.
已使用的參數文件:
D:\oracle\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
已使用 TNSNAMES 適配器來解析別名
嘗試連接 (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.14.147.112)(PORT = 42525)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = brorcl)))
TNS-12535: TNS: 操作超時
2. 我登陸到遠程服務器上，查看了一下監聽的狀態
C:\Documents and Settings\Administrator>lsnrctl status
LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 15-6月 -2015 09:52:54
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Production
Start Date 15-6月 -2015 09:36:02
Uptime 0 days 0 hr. 16 min. 55 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File F:\app\Administrator\product\11.2.0\dbhome_1\network\admin\listener.ora
Listener Log File F:\app\Administrator\product\11.2.0\dbhome_1\network\log\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=x3650m3)(PORT=47512)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=47512)))
Services Summary...
Service "BANKASSIST" has 1 instance(s).
Instance "brorcl", status READY, has 1 handler(s) for this service...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "brorcl" has 2 instance(s).
Instance "brorcl", status UNKNOWN, has 1 handler(s) for this service...
Instance "brorcl", status READY, has 1 handler(s) for this service...
Service "brorclXDB" has 1 instance(s).
Instance "brorcl", status READY, has 1 handler(s) for this service...
The command completed successfully
看到監聽也正常，本地連接進去也很正常。
3. 我想了一下本地能訪問遠程連接不上是不是防火墻問題，于是我關閉了windows防火墻，果然在遠程tnsping 能ping通了；
4. 結果：應該是防火墻有改動了，最后把 服務器防火墻的 ip和端口添加為例外，應用恢復正常了。
總結：
一般遇到tns 的問題通常都是監聽或者是網絡問題
1. 查看監聽是否正常
2. 查看 ip 或端口有沒有改動
3. 查看防火墻
以上所述是小編給大家介紹的解決ORA-12170:TNS connect timeout occurred問題，希望對大家有所幫助！
原文鏈接：https://blog.csdn.net/zhengwei125/article/details/46535437
