The proxy server received an invalid
response from an upstream server.
The proxy server could not handle the request GET /dataset/dataset/activity/temperature-salinity-and-nutrients-data-from-bottle-mbt-and-ctd-casts-in-the-sea-of-japan-and-t2.
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.