WorldRobertProject commented on issue #163:
URL:
https://github.com/apache/logging-log4net/issues/163#issuecomment-2741979323
Now when "DatePattern" is "yyyy-MM-dd", it reproduces the issue.
```
log4net:ERROR RollingFileAppender: INTERNAL ERROR. Append is False but
OutputFile [...\Log\2025-03-21.1.log] already exists.
```
When "DatePattern" is 'yyyy-MM-dd".log"', it causes the following error:
```
log4net:ERROR Could not create Appender [LogFileAppender] of type
[log4net.Appender.RollingFileAppender]. Reported error follows.
System.ArgumentNullException: Value cannot be null. (Parameter 'path1')
at System.ArgumentNullException.Throw(String paramName)
at System.IO.Path.Combine(String path1, String path2)
at log4net.Appender.RollingFileAppender.InitializeFromOneFile(String
baseFile, String curFileName) in
...\logging-log4net\src\log4net\Appender\RollingFileAppender.cs:line 794
at log4net.Appender.RollingFileAppender.InitializeRollBackups(String
baseFile, IList`1 arrayFiles) in
...\logging-log4net\src\log4net\Appender\RollingFileAppender.cs:line 910
at log4net.Appender.RollingFileAppender.DetermineCurSizeRollBackups() in
...\logging-log4net\src\log4net\Appender\RollingFileAppender.cs:line 654
at log4net.Appender.RollingFileAppender.ExistingInit() in
...\logging-log4net\src\log4net\Appender\RollingFileAppender.cs:line 748
at log4net.Appender.RollingFileAppender.ActivateOptions() in
...\logging-log4net\src\log4net\Appender\RollingFileAppender.cs:line 1025
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement) in
...\logging-log4net\src\log4net\Repository\Hierarchy\XmlHierarchyConfigurator.cs:line
316
log4net:ERROR Appender named [LogFileAppender] not found.
```
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