Googling yields this: https://social.msdn.microsoft.com/Forums/en-US/378905e5-297b-4235-a170-f519d77f02b9/iis7-web-app-error-could-not-load-type-systemsecurityclaimsclaimsidentity-from-assembly?forum=csharpgeneral
On 12 Nov 2017 11:36 a.m., "Mohkam Singh Sawhney" <singh...@yahoo.com> wrote: > We were using Log4Net v1.2.13.0 with an application that targets .net > framework 4 on windows server 2003, Below is the SmptAppender configuration > (hiding our production values with xxxx). We were able to receive email on > 'FATAL' log entry. > > <appender name="SmtpAppender" type="log4net.Appender.SmtpAppender"> > <to value="xxxx" /> > <from value="xxxx" /> > <subject type="log4net.Util.PatternString" value="xxxx" /> > <smtpHost value="xxxx" /> > <username value="xxxx" /> > <password value="xxxx" /> > <authentication value="Basic" /><bufferSize value="5" /><lossy > value="true" /><evaluator type="log4net.Core.LevelEvaluator"> > <threshold value="FATAL" /> > </evaluator><layout type="log4net.Layout.PatternLayout"> > <conversionPattern value="%newline%date %-5level [%logger] > %message%newline%exception%newline" /> > </layout> > </appender> > > We recently updated our application to use Log4Net v2.0.8, with the same > configuration for SmptAppender . After this update, we stopped receiving > emails. On enabling the internal log4Net logging, the below error was > logged. > > log4net: Created Appender [SmtpAppender] > log4net: Adding appender named [SmtpAppender] to logger [root]. > log4net: Hierarchy Threshold [] > log4net:ERROR [SmtpAppender] ErrorCode: GenericFailure. Failed in DoAppend > System.TypeLoadException: Could not load type > 'System.Security.Claims.ClaimsIdentity' > from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken= > b77a5c561934e089'. > at log4net.Core.LoggingEvent.get_UserName() > at log4net.Core.LoggingEvent.FixVolatileData(FixFlags flags) in > c:\log4net\tags\2.0.8RC1\src\Core\LoggingEvent.cs:line 1341 > at log4net.Appender.BufferingAppenderSkeleton.Append(LoggingEvent > loggingEvent) in c:\log4net\tags\2.0.8RC1\src\Appender\ > BufferingAppenderSkeleton.cs:line 483 > at log4net.Appender.AppenderSkeleton.DoAppend(LoggingEvent > loggingEvent) in c:\log4net\tags\2.0.8RC1\src\ > Appender\AppenderSkeleton.cs:line 317 > log4net: Shutdown called on Hierarchy [log4net-default-repository] > > If we revert back to Log4Net v1.2.13.0, we start receiving emails as > expected. Please advise how can we resolve the issue with version 2.0.8. > > > Thanks and Regards > > Mohkam Singh > >
