ORA-12541 with failover using a Client lower than 11.2 to SCAN Listener
(Doc ID 1365631.1)
Last updated on JANUARY 20, 2025
Applies to:
Oracle Net Services - Version 11.2.0.2 to 11.2.0.2 [Release 11.2]Oracle Database - Enterprise Edition - Version 19.6.1.0.0 and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A 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
When testing fail over capabilities OR when a failover condition occurs, you notice that clients connecting through the 11.2 SCAN Listener address fail to re-establish the connection with an ORA-12541 "TNS:no listener" error.
The clients are 11.1 or lower and might include 11.1 or lower JDBC Thin Clients / drivers.
Changes
Fail over testing or actual fail over condition with an 11.2 RAC environment and active-active nodes.
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |