ORA-3136 Inbound connection timed out
So, in our production EBS 12.1 database's alert.log, we have regular mentioning of ORA-3136, like shown below (IP's and ports are masked)
Question: how in eBS do I find out which process/action is causing this one ?
*********************************************************************** Fatal NI connect error 12170. VERSION INFORMATION: TNS for Linux: Version 12.1.0.2.0 - Production Oracle Bequeath NT Protocol Adapter for Linux: Version 12.1.0.2.0 - Production TCP/IP NT Protocol Adapter for Linux: Version 12.1.0.2.0 - Production Time: 21-SEP-2018 07:43:19 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=A.B.C.D)(PORT=Z)) Fri Sep 21 07:43:19 2018 WARNING: inbound connection timed out (ORA-3136) Fri Sep 21 07:43:36 2018 ***********************************************************************