some error of the Oracle connection TNS-03505 OR TNS-12541（原创）
（原创）配置tnsname是个十分轻易的问题，没什么好说的，以前也从来没有错过，不过今天配置的时候出了两个小问题（这两个问题是用GUI配置时不会出的，我觉得Java启动太慢，手工配置tnsname.ora时出现的）
C:>tnsping 100
TNS Ping Utility for 32-bit Windows: Version 9.2.0.1.0 - ProdUCtion on 15-OCT-2004 12:38:38
Copyright (c) 1997 Oracle Corporation.; All rights reserved.
Used parameter files:
F:oracleora92networkadmin qlnet.ora
Used HOSTNAME adapter to resolve the alias
Attempting to contact (DESCRIPTION=(CONNECT_DATA=(SID=*)(SERVICE_NAME=100))(ADDRESS=(PROTOCOL=TCP)(HOST=100)(PORT=1521)))
TNS-12541: TNS:no listener
查看Server端的监听,lsnrctl status，结果正常
查看tnsname.ora
100 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.6.100)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = oracas)
)
)
完全正确....
*******************************************************************
或者是
C:>tnsping 226
TNS Ping Utility for 32-bit Windows: Version 9.2.0.1.0 - Production on 15-OCT-2004 12:40:12
Copyright (c) 1997 Oracle Corporation.; All rights reserved.
Used parameter files:
F:oracleora92networkadmin qlnet.ora
TNS-03505: Failed to resolve name(意思是不存在226在文件tnsname.ora中)
查看tnsname.ora
226 =; (DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.6.226)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = oracas)
)
)
完全正确...
最后分析出导致上述两个问题的原因都是应为tns前面多了一个空格。。。。。。寒，居然是这种错误...
所以大家配置的时候小心细节问题
