Sorry for the noise, This question has been posted on http://answers.ros.org/question/223546/master-api-types/ Feel free to answer there. Cheers, -- AlexV -- AlexV 2016-01-06 10:44 GMT+09:00 Asmodehn Shade : > Hello, > > While exploring the Master API, I experienced something I didn't expect : > > After the last publisher ( and all subscribers ) on a topic is gone, the > topic still has a type and is still returned by getTopicTypes(). > > Did anyone experienced this ? Is it expected ? > Or is there some more complex behavior, like timeout or so ? > > If it s expected, then it means a topic cannot change type ? > > Also any reason why there isn't a similar getServiceTypes() API ? > > Thank you, > > -- > AlexV >