Since the 0.20.0 release and the pull request open-telemetry#2227 it seems that serviceName is deprecated and we should use service.name instead. I havn't easily found this information in the changelog, it did require some digging to understand why the service name was now a very long unknown_service:/path/to/node. Documentation says use service.name Resource attribute instead. but it wasn't about replacing serviceName: 'yourServiceName' by service: { name: 'yourServiceName'}.

removes service name option passed in exporter