[druid-user] Expected Behaviour of druid.coordinator.conversion.on

I think it is a legacy setting and you should just avoid it. Probably it was present to older convert segments to v9 format. I know that atleast from druid 0.7 version on-wards segments are by default written in v9 format. What are you trying to do ?

You can use it if this is what you are trying to do.