TNS-12535/12606 and ORA-3136 on Connection to Database
(Doc ID 2313573.1)
Last updated on JUNE 29, 2018
Applies to:Oracle Net Services - Version 188.8.131.52 to 184.108.40.206 [Release 12.1 to 12.2]
Information in this document applies to any platform.
When trying to connect the database, client reporting the following Error:
ORA-28547: connection to server failed, probable Oracle Net admin error
The database alert log is reporting the error codes.
Fatal NI connect error 12170.
TNS for Linux: Version 220.127.116.11.0 - Production
Oracle Bequeath NT Protocol Adapter for Linux: Version 18.104.22.168.0 - Production
TCP/IP NT Protocol Adapter for Linux: Version 22.214.171.124.0 - Production
Time: 30-SEP-2017 19:46:10
Tracing not turned on.
Tns error struct:
ns main err code: 12535
TNS-12535: TNS:operation timed out
ns secondary err code: 12606
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=XXX.XXX.XXX.XXX)(PORT=50745))
Sat Sep 30 19:46:10 2017
WARNING: inbound connection timed out (ORA-3136)
To view full details, sign in with your My Oracle Support account.
Don't have a My Oracle Support account? Click to get started!