Fast-Start Failover May Fail if Primary Nodes Crash One After Another (Doc ID 1995640.1)

Last updated on APRIL 29, 2015

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.3 to 11.2.0.4 [Release 11.2]
Information in this document applies to any platform.

Symptoms

If all instances of a primary crash and there is any delay in when each instance goes down with respect to the other instances, a Data Guard environment configured for MAXIMUM AVAILABLITY mode can become UNSYNCHRONIZED.

For example, let's say with a 2-node RAC primary, instance BOSTON1 goes down at 11:23:48.  Then at 11:24:20, instance BOSTON2 crashes. This would result in standby becoming unsynchronized.

Cause

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