The proxy server received an invalid
response from an upstream server.
The proxy server could not handle the request GET /dataset/dataset/stommel-20150805t0000z/resource/a47bd1e4-d784-4898-bd49-1852b0e44187.
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.