Troubleshooting ORA-3135 Connection Lost Contact
(Doc ID 787354.1)
Last updated on SEPTEMBER 08, 2023
Applies to:
Oracle Net Services - Version 10.2.0.1 and laterOracle Database - Enterprise Edition - Version 11.2.0.3 to 12.2.0.1 [Release 11.2 to 12.2]
Oracle Database - Standard Edition - Version 19.5.0.0.0 to 19.5.0.0.0 [Release 19]
Information in this document applies to any platform.
Purpose
Explains why a 3135 error is returned and helps to diagnose the underlying problem.
Troubleshooting Steps
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In this Document
Purpose |
Troubleshooting Steps |
(1) Transparent Application Failover (TAF) |
(2) Idle Connection Timeout |
(3) Firewall Manipulating Sqlnet Data. |
(4) Data Required for Further Analysis |