I resolved a lot of my ConnectionNotFoundException by changing that value to 200. But is there documentation on what that change does? And specifically, are there any performance issues to be concerned about?
The road network in OSM is not fully connected, so there are sometimes ‘islands’ of roads that cannot be reached from the rest of the network. The parameter just defines below which size these islands get removed from the network. So it does not necessarily affect the overall routing performance, but obviously it changes the routing calculations if the routes are close to these disconnected areas (because they might be completely removed from the road network)