[LOG4NET-685] Broken XmlLayoutSchemaLog4j

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.14
• Component/s: Layouts
• Labels: layout namespace namespaces schema xml
• Environment: Windows 11 Professional, Windows 10 Professional, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019 ; .NET Framework 4.5.2

Language

C#

• Assignee: Unassigned
• Reporter: Maciej Stiller
• Created: 01/Feb/22 13:41
• Updated: 22/Jul/22 12:54
• Resolved: 22/Jul/22 12:54

Description

After updating from version 2.0.8 to 2.0.14, using XmlLayoutSchemaLog4j seems to be broken resulting in a following error:

System.ArgumentException: Cannot set the namespace if Namespaces is 'false'.
   at System.Xml.XmlTextWriter.WriteStartElement(String prefix, String localName, String ns)
   at log4net.Layout.XmlLayoutSchemaLog4j.FormatXml(XmlWriter writer, LoggingEvent loggingEvent)
   at log4net.Layout.XmlLayoutBase.Format(TextWriter writer, LoggingEvent loggingEvent)
   at log4net.Appender.AppenderSkeleton.RenderLoggingEvent(TextWriter writer, LoggingEvent loggingEvent)
   at log4net.Appender.TextWriterAppender.Append(LoggingEvent loggingEvent)
   at log4net.Appender.FileAppender.Append(LoggingEvent loggingEvent)
   at log4net.Appender.RollingFileAppender.Append(LoggingEvent loggingEvent)

Configuration is initialized by executing XmlConfigurator, where Stream is pointing to configuration.xml

log4net.Config.XmlConfigurator.Configure(Stream configStream); 

After some digging I belive for it to be related to https://github.com/apache/logging-log4net/pull/18 which was introduced in version 2.0.13 under Bug fixes section

Issue Links

• relates to: LOG4NET-586 XmlLayoutSchemaLog4j throws exception under .Net Core
• relates to: LOG4NET-683 UdpAppender is no longer supported for .Net Framework!?