<p>
连接数据库时出现TNS:connection closed .</p><p>
</p><p>tnsping,也出现<span style="font-family: monospace; white-space: pre; background-color: rgb(240, 240, 240);">TNS:connection closed.</span></p>
C:\Users\Administrator>tnsping orcl
TNS Ping Utility for 64-bit Windows: Version 11.2.0.2.0 - Production on 01-JUN-2016 00:08:59
Copyright (c) 1997, 2014, Oracle. All rights reserved.
Used parameter files:
D:\app\Administrator\product\11.2.0\client_1\NETWORK\ADMIN\sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST =127.0.0.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME =XE)))
TNS-12537: TNS:connection closed
首先怀疑监听器出了问题
在启动监听时,出现了异常
Service "xe" has 1 instance(s).
Instance "xe", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
解决方案:
找到监听的ora文件:Listener Parameter File D:\app\Administrator\product\11.2.0\client_1\NETWORK\ADMIN\listener.ora
核对以下配置内容
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = xe)
(ORACLE_HOME =d:\app\Administrator\product\11.2)
(SID_NAME = xe)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST =127.0.0.1)(PORT = 1521))
)
)
ADR_BASE_LISTENER = d:\app\Administrator
注:xe为数据库实例名
重启后恢复正常