Archive files are lost when the sequence number in archive suffix reaches the highest possible number #6055
Description
NLog version: 6.0.6
Platform: .NET Framework 4.8 on Windows.
Current NLog config
var fileTarget = new FileTarget
{
Name = nameof(RollingFileNLogConsumer),
FileName = filePath,
ArchiveAboveSize = maxFileSize,
ArchiveSuffixFormat = "_{1:yyyyMMdd}_{0:00}",
MaxArchiveFiles = maxNumFiles,
Layout = pattern.IsNullOrEmpty() ? DefaultLayout : pattern
};
- What is the current result?
When the sequence number reaches the full digits defined in the archive suffix, it goes to the next number, 100, and keeps using/overwriting 100.
D:\Folder>ls -ltr nlog*
-rw-rw-rw- 1 qiuwen01-pa 0 525072 2025-12-04 16:45 nlogfile_20251204_91
-rw-rw-rw- 1 qiuwen01-pa 0 530904 2025-12-04 16:45 nlogfile_20251204_92
-rw-rw-rw- 1 qiuwen01-pa 0 552754 2025-12-04 16:45 nlogfile_20251204_93
-rw-rw-rw- 1 qiuwen01-pa 0 525072 2025-12-04 16:45 nlogfile_20251204_94
-rw-rw-rw- 1 qiuwen01-pa 0 530907 2025-12-04 16:46 nlogfile_20251204_95
-rw-rw-rw- 1 qiuwen01-pa 0 552766 2025-12-04 16:46 nlogfile_20251204_96
-rw-rw-rw- 1 qiuwen01-pa 0 525073 2025-12-04 16:46 nlogfile_20251204_97
-rw-rw-rw- 1 qiuwen01-pa 0 530904 2025-12-04 16:46 nlogfile_20251204_98
-rw-rw-rw- 1 qiuwen01-pa 0 552750 2025-12-04 16:46 nlogfile_20251204_99
-rw-rw-rw- 1 qiuwen01-pa 0 623002 2025-12-04 16:50 nlogfile_20251204_100
-rw-rw-rw- 1 qiuwen01-pa 0 212267 2025-12-04 16:50 nlogfile
-
What is the expected result?
I expect the sequence number to keep going: 100, 101, 102, 103 and on and on -
Did you checked the Internal log?
No -
Please post full exception details (message, stacktrace, inner exceptions)
N/A -
Are there any workarounds? yes/no
Not that I am aware of. -
Is there a version in which it did work?
N/A -
Can you help us by writing an unit test?
N/A