Generically when databases are overloaded they sometimes work better in the
early morning or before noon GMT. One technical reason is the log files
are shorter. So if you've been working in JOSM just save the file then try
an upload early next morning.
This also works on overloaded internet
Dear Friends,
OpenStreetMap is undergoing some maintenance (main servers being moved
to new location) and is running on reduced hardware for the next week
or two.
As a result, uploads to the server have been affected and several
folks across OSM are reporting problems.
Please make sure to save