With this function, the resolver checks all associated URLs and marks them either with a green tick or, in the event of an error, with a red cross. Users are redirected to the first URL marked in green.

Analyse	urn:nbn:de:gbv:7-isbn-978-3-86395-371-3-2
	https://doi.org/10.17875/gup2018-1101 STATUS : 302 → Redirecting to : http://resolver.sub.uni-goettingen.de/purl?univerlag-isbn-978-3-86395-371-3
	http://resolver.sub.uni-goettingen.de/purl?univerlag-isbn-978-3-86395-371-3 RESTEASY004655: Unable to invoke request: java.net.SocketTimeoutException: Read timed out
	http://d-nb.info/1166652564/34 STATUS : 301 → Redirecting to : https://d-nb.info/1166652564/34
	https://d-nb.info/1166652564/34 STATUS : 404 → Skipping : https://d-nb.info/1166652564/34

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