TNS-12535

Fatal NI connect error 12170.

VERSION INFORMATION:
TNS for Linux: Version 11.2.0.3.0 - Production
Oracle Bequeath NT Protocol Adapter for Linux: Version 11.2.0.3.0 - Production
TCP/IP NT Protocol Adapter for Linux: Version 11.2.0.3.0 - Production
Time: 17-JAN-2017 16:13:44
Tracing not turned on.
Tns error struct:
ns main err code: 12535

TNS-12535: TNS:operation timed out
ns secondary err code: 12560
nt main err code: 505

TNS-00505: Operation timed out
nt secondary err code: 110
nt OS err code: 0
Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=192.163.79.141)(PORT=50746))
Tue Jan 17 16:14:11 2017

配置sqlnet.ora

[oracle@db1 admin]$ cat sqlnet.ora
sqlnet.expire_time = 1