ORA-03135 on SCAN Listener relocate; but only for SHARED Sessions, not DEDICATED

(Doc ID 2331361.1)

Last updated on NOVEMBER 22, 2017

Applies to:

Oracle Net Services - Version 11.2.0.4 to 12.1.0.2 [Release 11.2 to 12.1]
Oracle Database - Enterprise Edition - Version 11.2.0.4 to 12.1.0.2 [Release 11.2 to 12.1]
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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