Tor version 0.2.7.6 Tor relay logged this a few times:

Jun 02 07:24:40.000 [warn] Received http status code 504 ("Gateway Time- out") from server '154.35.175.225:80' while fetching "/tor/server/d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z". I'll try again soon.

Best regards Robin