I perform an uploading of WorldImage file using REST. This REST-request takes a lot of time because the WorldImage file is big enough. So, the problem is that the GeoServer becomes freezed while an uploading process is continuing. I can't do anything via Web-interface of my GeoServer. When the uploading process is finished, the GeoServer becomes working again.
This is not normal behavior, I guess. Because users, who want to upload files to GeoServer, are forced to wait until another user is finished its REST-request.