Oracle业务系统无法连接,检查网络,检查侦听,都没问题,tnsping也没问题,就是无法连接,不用想了。。看alert日志,如下报错,
Fatal NI connect error 12537, connecting to:
(LOCAL=NO)

VERSION INFORMATION:
TNS for 64-bit Windows: Version 11.2.0.1.0 - Production
Oracle Bequeath NT Protocol Adapter for 64-bit Windows: Version 11.2.0.1.0 - Production
Windows NT TCP/IP NT Protocol Adapter for 64-bit Windows: Version 11.2.0.1.0 - Production
Time: 09-3月 -2018 16:55:48
Tracing not turned on.
Tns error struct:
ns main err code: 12537

TNS-12537: TNS: 连接关闭
ns secondary err code: 12560
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
opiodr aborting process unknown ospid (4564) as a result of ORA-609
Oracle无法启动侦听,连接特别慢解决办法
尝试各种方法都没搞定,侦听启动和停止都特别慢。
查看监听日志的大小,位置如下:
$ORACLE_BASE\diag\tnslsnr\<hostname>\listener\trace\listener.log——4G大小
官方说明:
出现该BUG问题的平台

Oracle Net Services - Version 11.1.0.7 to 11.2.0.4 [Release 11.1 to 11.2]

Microsoft Windows (32-bit)
Microsoft Windows x64 (64-bit)
This issue is limited to the Windows OS.
Checked for relevance on 14-OCT-2013
解决方法:关闭监听写日志
脚本:
LSNRCTL>set current_listener <listener_name>
LSNRCTL>set log_status OFF
LSNRCTL>save_config
或者,,重命名listener.log,然后重启服务,好了。。。。。开心。。。