How to remove an instance

[hutorny]

A writer creates an instance by writing data to its topic. Eventually, that instance may become not relevant and writer needs to remove it, so that existing subscribers get rid of it, and late subscribers would not get an irrelevant instance. Fast DDS API provides method dispose, described as
This operation requests the middleware to delete the data (the actual deletion is postponed until there is no more use for that data in the whole system).
In my application dispose has no effect. I guess, no more use condition is not satisfied.
Is there a way to forcefully remove an instance?

[JesusPoderoso]

Hi @hutorny, thanks for using Fast DDS.
First of all, make sure that your topic has keys.

In my application dispose has no effect. I guess, no more use condition is not satisfied.

That may be caused by a Reader that has not performed the take call yet.

... so that existing subscribers get rid of it, and late subscribers would not get an irrelevant instance.

You should also take into account that the dispose() method does not avoid late joiners to receive information from the disposed instance, meanwhile unregister_instance() method does.