About a dozen DOI requests failed last night due to a DataCite outage, but all is fine now. Here is the announcement from DataCite:
There was a MDS glitch today (2013-10-11) from 09:37 to 11:06 UTC. Most of
the incoming requests timed out (error 504). In particular no DOI
registration or update was possible.
MDS is now up and running again.
It looks like that during this time the connection to the database broke
down and MDS did not recover automatically but had to be restarted manually.
We’ll try to investigate a bit further to prevent this type of error in the
We apologize for any inconveniences.