The proxy server received an invalid
response from an upstream server.
The proxy server could not handle the request GET /dataset/dataset/h11650-nos-hydrographic-survey-mid-atlantic-corridor-maryland-2007-11-18/resource/0a8e3641-410a-4199-839a-a2c999a9a7a0.
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.