This error (with all related 'unresolved type' errors) appeared while installing Maven project. There were no changes related to dbcp, I tried to delete all the local repos, installed again and commons-dbcp was downloaded, so dependencies are fine I suppose (actually I could install with the same dependencies a couple of hours ago). What could be a reason of such behaviour?
Well, in this case I had a problem because of a unused import of the server-side class in one of the presenters (that I had put there by mistake and then forgot about), probably it was a reason of an attempt to autowire a bean that was in the application context and it was just not the right time for it.