Standby instance does not start anymore after upgrading to Oak 1.8.25

Description

After upgrading to Oak 1.8.25, AEM instances starting in standby mode throw an IllegalArgumentException.

21.01.2022 18:07:25.073 *ERROR* FelixStartLevel org.apache.jackrabbit.oak-segment-tar bundle org.apache.jackrabbit.oak-segment-tar:1.8.25 (107)org.apache.jackrabbit.oak.segment.standby.store.StandbyStoreService(242) : The activate method has thrown an exception (java.lang.IllegalArgumentException: Unexpected mode property, got 'standby')
java.lang.IllegalArgumentException: Unexpected mode property, got 'standby'
    at org.apache.jackrabbit.oak.segment.standby.store.StandbyStoreService.activate(StandbyStoreService.java:157) org.apache.jackrabbit.oak-segment-tar:1.8.25

Resolution

The issue has been reported to Jackrabbit Oak: https://issues.apache.org/jira/browse/OAK-9677

Do not upgrade your Cold Standby instances to Oak 1.8.25

On this page