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TNS-12518 and TNS-12540 Errors Reported in Listener Log (Doc ID 1539108.1)

Last updated on JANUARY 22, 2025

Applies to:

Oracle Net Services - Version 11.1.0.6 and later
Oracle Database - Enterprise Edition - Version 10.2.0.5 to 11.2.0.4 [Release 10.2 to 11.2]
Oracle Database - Enterprise Edition - Version 19.15.0.0.0 and later
Gen 2 Exadata Cloud at Customer - Version N/A and later
Oracle Cloud Infrastructure - Exadata Cloud Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

1.Have a Large number of connections simultaneously and received the following error with new connection attempts :

 

Cause

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In this Document
Symptoms
Cause
Solution
References


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