On 06/30/2017 01:42 PM, James B. Byrne wrote:
The setup is somewhat complicated in that the VAN will not permit direct rsync access and so we establish the link via sshfs and then mount remote location as local.
sshfs doesn't seem to preserve/transmit ctime, so rsync won't be able to reliably determine whether a file has changed based on times. There's a small chance that you'll miss updates in this configuration. That's probably not related to your problem, just a note on that setup.
Regarding the empty file, perhaps the source had the file locked for reading. Do you know what type of system is providing the data?