exclusive ownership strength QoS

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Unregistration of instances in exclusive keyed topic with multiple writers

Hello,

I want to achieve some kind of redundancy using keyed topics and exclusive ownership. Therefore I have multiple writers for the topic each with a different strength.
When the writer with the highest strength unregisters its instance, I want the readers to be notified and they should then read the highest strength instance alive.

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Is a publish (write) required to obtain exclusive ownership

Quick question:

I have a topic, I intend to use it without a key, however it seems to work the same with keys.  The topic has a QoS of exclusive ownership.  I have two or more publishers with different ownership strengths.

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