The proxy server received an invalid
response from an upstream server.
The proxy server could not handle the request GET /dataset/dataset/h12372-nos-hydrographic-survey-chatham-strait-alaska-2011-10-08/resource/3ef691a2-3a8f-4ca6-934a-17e990120cca.
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.