Re: [I] RollingFileAppender overwrites an old log even if AppendToFile is true when RollingStyle is Composite and there are some logs on that day. (logging-log4net)

[via GitHub]

WorldRobertProject commented on issue #163:
URL: 
https://github.com/apache/logging-log4net/issues/163#issuecomment-2791434238

   Here is the setting which reproduces the issue.
   
   ```
   <?xml version="1.0" encoding="utf-8" ?>
   <configuration>
     <log4net>
       <appender name="LogFileAppender" 
type="log4net.Appender.RollingFileAppender">
         <param name="File" value=".\Log\.log" />
         <param name="AppendToFile" value="true" />
         <param name="RollingStyle" value="Composite" />
         <param name="DatePattern" value="yyyy-MM-dd" />
         <param name="MaximumFileSize" value="3MB" />
         <param name="MaxSizeRollBackups" value="3" />
         <param name="StaticLogFileName" value="false" />
         <param name="CountDirection" value="1" />
         <param name="PreserveLogFileNameExtension" value="true"/>
         <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
         <layout type="log4net.Layout.PatternLayout">
           <param name="ConversionPattern" value="%d{yyyy/MM/dd HH:mm:ss.fff} 
[%-5p] %m (%M)%n"/>
         </layout>
       </appender>
   
       <logger name="log">
         <level value="debug" />
         <appender-ref ref="LogFileAppender" />
       </logger>
     </log4net>
   </configuration>
   ```
   
   Here is the test code.
   
   ```
   using log4net;
   using log4net.Config;
   using System;
   using System.IO;
   using System.Reflection;
   
   namespace TestLog4net
   {
       class Program
       {
           private static void Main()
           {
               var pathConfig = 
Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log4net.config.xml");
               XmlConfigurator.Configure(new FileInfo(pathConfig));
   
               var assembly = Assembly.GetEntryAssembly();
               var logger = LogManager.GetLogger(assembly, "log");
   
               logger.Info("Hello, log4net!");
           }
       }
   }
   ```
   
   We prepared the following three log files:
   - 2025-04-10.0.log (4.10 MB)
   - 2025-04-10.1.log (4.10 MB)
   - 2025-04-10.2.log (4.10 MB)
   
   After we executed the test code, 2025-04-10.1.log was truncated and 
overwritten.


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