RollingFileAppender does not enumerate all existing rollback files and then overwrites logs during rollback creating gaps

[vladislav-dobzinski-etr]

I'm using log4net for .NET Framework version 2.0.8

RollingFileAppender is used with CountDirection=1

On startup log4net enumerates existing rollback files and sets curSizeRollBackups

Sometimes log4net does not discover ALL existing rollback files and then new rollback is created, deletes an existing file and creates new rollback. This behavior causes gaps in logs.

In attached log4net internal debug file there are issues with B7EBL.log.455, B7EBL.log.459, B7EBL.log.460 files
Files B7EBL.log.455 and B7EBL.log.459 were not discovered and curSizeRollBackups was not set correctly

log4net: File name [b7ebl.log.450] moves current count to [450]
log4net: curSizeRollBackups starts at [450]
...
log4net: Deleted file [E:\zurnalai\B7Logs\B7EBL.log.455]
log4net: Moving [E:\zurnalai\B7Logs\B7EBL.log] -> [E:\zurnalai\B7Logs\B7EBL.log.455]
...
log4net: File name [b7ebl.log.458] moves current count to [458]
log4net: curSizeRollBackups starts at [458]
...
log4net: Deleted file [E:\zurnalai\B7Logs\B7EBL.log.459]
log4net: Moving [E:\zurnalai\B7Logs\B7EBL.log] -> [E:\zurnalai\B7Logs\B7EBL.log.459]
...
log4net: Deleted file [E:\zurnalai\B7Logs\B7EBL.log.460]
log4net: Moving [E:\zurnalai\B7Logs\B7EBL.log] -> [E:\zurnalai\B7Logs\B7EBL.log.460]

log4net.log

[FreeAndNil]

@vladislav-dobzinski-etr can you check whether the fix in #232 solves your problem?

[vladislav-dobzinski-etr]

No.
Setting didn't help.
Still while enumerating existing files on startup log4net doesn't "see" existing files and then deletes them during rollback.
How log4net decide about file existence?
Potentially files may be analyzed by agent, which collect logs from files to centralized location for analysis or by antivirus software