I get this error in tail log, and it seems like it´s happening everytime I´m navigating through Things in Habmin.
I have no idea why. And I can´t really see any symptoms either, except for the log ofcouse.
2018-06-28 23:40:13.078 [ERROR] [e.internal.WriterInterceptorExecutor] - MessageBodyWriter not found for media type=text/plain, type=class java.util.Collections$UnmodifiableCollection, genericType=class java.util.Collections$UnmodifiableCollection.