I’ve seen a few posts about this error and how to solve it, but it’s never mentioned what’s the cause of it…
I’ve had this error on a few of my backup jobs, and it seemed the reason was mostly because the job was interrupted for some reason like a network outage or system reboot.
Today I managed to reproduce the error consistently, and I hope this can help debug the root of the problem. Here are the steps I took:
- Create a backup job with the destination set to SSH/SFTP.
- Start the job, and let it upload a couple of volumes.
- Attempt to stop it by requesting to “Stop after upload”. It is a known bug that this will not actually stop the job, and it will go on.
- Now stop the job by selecting the option “Stop now”.
- Attempt to start the job again. The error
Unexpected difference in fileset version X: found Y entries, but expected Zwill be generated.
Here are the settings I use:
Running Duplicati-2.0.4.12_canary_2019-01-16
General Settings:
--allow-sleep=true
--usn-policy=Auto
--tempdir=E:\Temp\SYSTEM\Duplicati
--retry-delay=20s
--number-of-retries=10
--dont-compress-restore-paths=true
--concurrency-block-hashers=6
--concurrency-max-threads=8
--concurrency-compressors=3
Job-specific settings:
--ssh-fingerprint=ssh-rsa 2048 {xxx}
Remote volume size: 10MB
Retention: Keep all backups
Error from the internal log:
Duplicati.Library.Interface.UserInformationException: Unexpected difference in fileset version 1: 2019-01-30 16:19:11 (database id: 1), found 76 entries, but expected 417 at
Duplicati.Library.Main.Database.LocalDatabase.VerifyConsistency(Int64 blocksize, Int64 hashsize, Boolean verifyfilelists, IDbTransaction transaction) at
Duplicati.Library.Main.Operation.Backup.BackupDatabase.<>c__DisplayClass32_0.<VerifyConsistencyAsync>b__0() at
Duplicati.Library.Main.Operation.Common.SingleRunner.<>c__DisplayClass3_0.<RunOnMain>b__0() at
Duplicati.Library.Main.Operation.Common.SingleRunner.<DoRunOnMain>d__2`1.MoveNext() --- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at
Duplicati.Library.Main.Operation.BackupHandler.<RunAsync>d__19.MoveNext() --- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
CoCoL.ChannelExtensions.WaitForTaskOrThrow(Task task) at
Duplicati.Library.Main.Controller.<>c__DisplayClass13_0.<Backup>b__0(BackupResults result) at
Duplicati.Library.Main.Controller.RunAction[T](T result, String[]& paths, IFilter& filter, Action`1 method) at
Duplicati.Library.Main.Controller.Backup(String[] inputsources, IFilter filter) at
Duplicati.Server.Runner.Run(IRunnerData data, Boolean fromQueue)