DOI Schema changed form 3 to 4.

[Jose Blanco]

I have a question about going from DOI schema 3 to 4. I have put this
in place on our production site, and I'm finding that sometimes (not
always) if an item changes and a request to update it is sent to
DataCite, you get a failure, but if you make the request again a few
times, the request finally succeeds. I changed 72 items the other day
and I think it took about 6 calls of `./dspace doi-organiser -u `
for all 72 items to be updated and for failures to stop being
reported. I can see in the doi table that the status for these items
went eventually from 6, to 3. I wonder if anyone else has experienced
this and has a fix?

Thank you!
-Jose