In the last two days, some of my backups have began to fail with “System.IO.IOException: Rakenne vaatii puhdistusta”. Since the message stays in Finnish even when I change language to English in the Web UI settings, I assume this message comes from .NET/Mono. If I translate the part in Finnish word-by-word, it says something like “Structure requires cleanup”.
The problem with this kind of trouble is that all I get is this message (and the call stack), nothing else. I don’t know what to check. I get the same message from backup, verify, repair and list-broken-files. Other commands I have not found reasonable to try out.
This problem has occurred with two of my backup sets. A third one complained about broken files, and I got it fixed by running purge-broken-files. In that case, the message was clear enough. But this other one is not. I wish Duplicati could provide me a little more help for trouble-shooting.
The problem appeared in Duplicati - 18.104.22.168_beta_2021-05-03 on Ubuntu 20.04 and I am making my backups onto an external disk. Until now, it has been working fine. I am afraid this error could indicate a problem with the disk, so I don’t believe that upgrading Duplicati right now to the latest version would help.
Before buying a new disk, however, I would like to see if someone could help me clarify what really is going on.