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Services are Running on Wrong RAC Instances (Doc ID 965385.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 10.1 to 10.2]
Information in this document applies to any platform.


On a 4 node RAC cluster, database services are running on the wrong instances after instance restart.

Consider the following service configuration:

$ srvctl config service -d racdb
sales_racdb PREF: racdb1 racdb2 AVAIL: racdb3 racdb4
hr_racdb PREF: racdb2 AVAIL: racdb1

The service 'hr_racdb' was running on all 4 instances when it should have been running on instance 2 (racdb2) only.

This caused user sessions to be connected to the wrong instances, leading to load problems.

The same happened for another service (sales_racdb).


All instances had been restarted during maintenance window.


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