GStreamer error: Could not resolve server name

I am listening to an mp3 internet radio stream with mopidy, which stops now and then. The log files show a GStreamer error, e.g.
mopidy[629]: ERROR [MainThread] mopidy.audio.gst GStreamer error: Could not resolve server name most of the time,but I’ve seen also "GStreamer error: Server does not support seeking." I have a (good) wired Internet connection on my Raspberry PI, I’ve checked it also immediately after the error. Restarting the playback always works (it is very annoying though that the PlaybackController does not report any error, so I don’t know how front-ends should handle the situation…)
How can I find more information about the problem?

Thanks,