The proxy server received an invalid
response from an upstream server.
The proxy server could not handle the request GET /dataset/dataset/h12857-nos-hydrographic-survey-2017-01-03/resource/0b6e70a9-1a4d-4c01-bee8-f0bfc8470879.
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.