Troubleshooting ORA-3135 Connection Lost Contact
(Doc ID 787354.1)
Last updated on JUNE 08, 2020
Applies to:Oracle Net Services - Version 10.2.0.1 and later
Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 11.2 to 12.2]
Oracle Database - Standard Edition - Version 184.108.40.206.0 to 220.127.116.11.0 [Release 19]
Information in this document applies to any platform.
Explains why a 3135 error is returned and helps to diagnose the underlying problem.
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In this Document
|(1) Transparent Application Failover (TAF)|
|(2) Idle Connection Timeout|
|(3) Firewall Manipulating Sqlnet Data.|
|(4) Data Required for Further Analysis|