We are using Sync Framework 2.1 to synchronize files from one location to another one. Sometimes Sync Framework throws following exception when we are trying to synchronize files (by calling SyncOrchestrator.Synchronize()):
"The simple provider requires non-null item fields on a successful completion of this call."
Problem occurs randomly and it's not clear for us when this kind of problem may occur. It seems that synchronization will succeed if we remove files from Sync Framework's metadata store.
Files are synchronized between two Azure blob storage containers.