The proxy server received an invalid
response from an upstream server.
The proxy server could not handle the request GET /dataset/dataset/f00473d-nos-hydrographic-survey-san-diego-bay-california-2001-04-13/resource/f9ab7025-f8e2-4e52-aff7-1a7d9bda968e.
Reason: DNS lookup failure for: os-data-catalog.ngdc.noaa.gov
Additionally, a 502 Bad Gateway error was encountered while trying to use an ErrorDocument to handle the request.