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ORA-03135 on SCAN Listener relocate; but only for SHARED Sessions, not DEDICATED (Doc ID 2331361.1)

Last updated on JANUARY 21, 2025

Applies to:

Oracle Database Cloud Schema Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

On : 11.2.0.4 or 12.1.0.2 version, Real Application Cluster

Client connections being made via the SCAN Listener and using SHARED Server connections (via Dispatcher).

As soon as the SCAN Listener relocates from one node to the other, the Client connection is aborted:

Operational Error: ORA-03135: connection lost contact
Process ID: 260054
Session ID: 845 Serial number: 59167

When making DEDICATED Server connections, however, this does not occur.

Cause

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In this Document
Symptoms
Cause
Solution


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