Data Guard RAC How do you avoid a false fast start failover to the physical standby when a RAC node fails

(Doc ID 1319917.1)

Last updated on OCTOBER 18, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 to 11.2.0.2 [Release 10.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 24-Sep-2013***

Symptoms

The Environment:

Multiple Node RAC Primary
Multiple Node RAC Physical Standby
Fast Start Failover is configured and the observer is running.
The Problem:
When one of the RAC nodes fails in the Primary Site the observer triggers a false faststart failover to the Standby site even though there are nodes and RAC instances still available at the Primary site. 
This is considered to be a false fail over.  If the environment is configured correctly a fail over to the standby site should not occur given this specific scenario.  The Observer should be reconnecting to the remaining Primary Site instances and a fail over only initiated when the Observer and the Standby site are no longer able to connect to any of the RAC primary site instances.  All primary site instances must be unavailable before a fail over occurs.


Changes

The Fast Start Failover threshold is set to the default value of 30 seconds or less.  This will be to small for RAC configurations.

Cause

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