All I did was wait for the “good” backup to run, then started the “bad” backup and this time it created a log file. No idea why it did not do this the first time, I assure you no settings have been changed.
Here is the tail of the log leading up to the stalled behaviour. This does look to be an issue with the synthetic file list
2026-05-02 17:33:52 +01 - [Profiling-Timer.Begin-Duplicati.Library.Main.Operation.Common.DatabaseCommon-CommitTransactionAsync]: Starting - PreSyntheticFilelist
2026-05-02 17:33:52 +01 - [Profiling-Timer.Begin-Duplicati.Library.Main.Database.ReusableTransaction-PreSyntheticFilelist]: Starting - CommitTransaction: PreSyntheticFilelist
2026-05-02 17:33:52 +01 - [Profiling-Timer.Finished-Duplicati.Library.Main.Database.ReusableTransaction-PreSyntheticFilelist]: CommitTransaction: PreSyntheticFilelist took 0:00:00:00.000
2026-05-02 17:33:52 +01 - [Profiling-Timer.Finished-Duplicati.Library.Main.Operation.Common.DatabaseCommon-CommitTransactionAsync]: PreSyntheticFilelist took 0:00:00:00.000
2026-05-02 17:33:57 +01 - [Information-Duplicati.Library.Main.Operation.Backup.UploadSyntheticFilelist-PreviousBackupFilelistUpload]: Uploading filelist from previous interrupted backup
2026-05-02 17:33:57 +01 - [Profiling-Timer.Begin-Duplicati.Library.Main.Database.ExtensionMethods-ExecuteScalarInt64Async]: Starting - ExecuteScalarInt64Async:
SELECT “ID”
FROM “Remotevolume”
WHERE “Name” = “duplicati-20260423T110008Z.dlist.zip.aes”2026-05-02 17:33:57 +01 - [Profiling-Timer.Finished-Duplicati.Library.Main.Database.ExtensionMethods-ExecuteScalarInt64Async]: ExecuteScalarInt64Async:
SELECT “ID”
FROM “Remotevolume”
WHERE “Name” = “duplicati-20260423T110008Z.dlist.zip.aes”
took 0:00:00:00.000
2026-05-02 17:33:57 +01 - [Profiling-Timer.Begin-Duplicati.Library.Main.Database.ExtensionMethods-ExecuteScalarInt64Async]: Starting - ExecuteScalarInt64Async:
SELECT “ID”
FROM “Remotevolume”
WHERE “Name” = “duplicati-20260423T110009Z.dlist.zip.aes”2026-05-02 17:33:57 +01 - [Profiling-Timer.Finished-Duplicati.Library.Main.Database.ExtensionMethods-ExecuteScalarInt64Async]: ExecuteScalarInt64Async:
SELECT “ID”
FROM “Remotevolume”
WHERE “Name” = “duplicati-20260423T110009Z.dlist.zip.aes”
took 0:00:00:00.000
2026-05-02 17:33:57 +01 - [Profiling-Timer.Begin-Duplicati.Library.Main.Database.ExtensionMethods-ExecuteScalarInt64Async]: Starting - ExecuteScalarInt64Async:
INSERT INTO “Remotevolume” (
“OperationID”,
“Name”,
“Type”,
“State”,
“Size”,
“VerificationCount”,
“DeleteGraceTime”,
“ArchiveTime”,
“LockExpirationTime”
)
VALUES (
94,
“duplicati-20260423T110009Z.dlist.zip.aes”,
“Files”,
“Temporary”,
-1,
0,
0,
0,
0
);
SELECT last_insert_rowid();2026-05-02 17:33:57 +01 - [Profiling-Timer.Finished-Duplicati.Library.Main.Database.ExtensionMethods-ExecuteScalarInt64Async]: ExecuteScalarInt64Async:
INSERT INTO “Remotevolume” (
“OperationID”,
“Name”,
“Type”,
“State”,
“Size”,
“VerificationCount”,
“DeleteGraceTime”,
“ArchiveTime”,
“LockExpirationTime”
)
VALUES (
94,
“duplicati-20260423T110009Z.dlist.zip.aes”,
“Files”,
“Temporary”,
-1,
0,
0,
0,
0
);
SELECT last_insert_rowid();
took 0:00:00:00.000
2026-05-02 17:33:57 +01 - [Profiling-Timer.Begin-Duplicati.Library.Main.Database.ExtensionMethods-ExecuteScalarInt64Async]: Starting - ExecuteScalarInt64Async:
INSERT INTO “Fileset” (
“OperationID”,
“Timestamp”,
“VolumeID”,
“IsFullBackup”
)
VALUES (
94,
1776942009,
10578,
0
);
SELECT last_insert_rowid();2026-05-02 17:33:57 +01 - [Profiling-Timer.Finished-Duplicati.Library.Main.Database.ExtensionMethods-ExecuteScalarInt64Async]: ExecuteScalarInt64Async:
INSERT INTO “Fileset” (
“OperationID”,
“Timestamp”,
“VolumeID”,
“IsFullBackup”
)
VALUES (
94,
1776942009,
10578,
0
);
SELECT last_insert_rowid();
took 0:00:00:00.000
2026-05-02 17:33:57 +01 - [Profiling-Timer.Begin-Duplicati.Library.Main.Database.ReusableTransaction-Unnamed commit]: Starting - CommitTransaction: Unnamed commit
2026-05-02 17:33:57 +01 - [Profiling-Timer.Finished-Duplicati.Library.Main.Database.ReusableTransaction-Unnamed commit]: CommitTransaction: Unnamed commit took 0:00:00:00.000