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Troubleshooting ORA-3136 Connection Timeouts Errors - Database Diagnostics (Doc ID 730066.1)

Last updated on AUGUST 08, 2022

Applies to:

Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database - Enterprise Edition - Version and later
Oracle Net Services - Version to [Release 11.2]
Information in this document applies to any platform.


This troubleshooting guide contains information on how to diagnose issues with connection timeouts where the origin of the problem is suspected to be inside the Oracle Database.
In such cases, a first investigation at the network layer or Oracle Net may have pointed to the Database as a possible location for the root cause of the timeout.

Troubleshooting Steps

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In this Document
Troubleshooting Steps
 Connection Timeout errors ORA-3135 and ORA-3136
 Authentication SQL
 Hangs during Authentication
 Troubleshooting of Authentication hangs
 Examples of issues which can result in Authentication hangs
 Other approaches to avoid the problem

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