2009/4/8 omatase <[email protected]>
>
>
> Daniel Marohn wrote:
> >
> > I did some research about this
> >
> > I checked the log4net sources. The error is thrown in
> > AppenderSkelleton (the base class of all appenders).
> > public void DoAppend(LoggingEvent[] loggingEvents) {
> > ..
> > if (m_closed)
> > {
> > ErrorHandler.Error("Attempted to append to closed appender named
> > ["+m_name+"].");
> > return;
> > }
> > }
> >
> > m_closed in only set in
> > public void Close()
> >
> > it reads in code docu:
> > It is a programming error to append to a closed appender.
> >
> > Perhaps this is really a bug in one of the log4net appenders.
> >
> > Can you post a simple as possible config, that reproduces the error on
> > your system? I will try to reproduce this and debug into log4net to
> > see whats going wrong with the appender.
> >
> >
>
> Thanks for your help. Following is a minimalist example of one that fails.
> The error it causes is "log4net:ERROR [FileAppender] Attempted to append to
> closed appender named [FileAppender]." and can be seen in the Visual Studio
> "Output" window.
>
>
> <log4net>
> <root>
> <level value="DEBUG" />
> <appender-ref ref="FileAppender" />
> </root>
> <logger name="Invoicing">
> <level value="DEBUG" />
> <appender-ref ref="FileAppender" />
> </logger>
> <logger name="Invoicing">
> <level value="FATAL" />
> <appender-ref ref="FileAppenderFatal" />
> </logger>
> <!-- Setup the root category, add the appenders and set the default
> level -->
> <appender name="FileAppender" type="log4net.Appender.FileAppender">
> <file value="C:\Log.txt" />
> <appendToFile value="true" />
> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
> <layout type="log4net.Layout.PatternLayout">
> <conversionPattern value="%date [%thread] %-5level %logger
> [%property{NDC}] - %message%newline" />
> </layout>
> </appender>
> <appender name="FileAppenderFatal" type="log4net.Appender.FileAppender">
> <file value="C:\LogFatal.txt" />
> <appendToFile value="true" />
> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
> <layout type="log4net.Layout.PatternLayout">
> <conversionPattern value="%date [%thread] %-5level %logger
> [%property{NDC}] - %message%newline" />
> </layout>
> </appender>
> </log4net>
>
> You'll see that although the example *may* not be practical, it should be
> possible. It's not super realistic for someone to want a FileAppender only
> for FATAL messages although it *could* happen. I replaced the
> AdoNetAppender
> with the FileAppenderFatal in the interest of making the smallest possible
> reproducible configuration.
>
> Interestingly, this configuration does *not* reproduce the error:
>
> <log4net>
> <root>
> <level value="DEBUG" />
> <appender-ref ref="FileAppender" />
> </root>
> <logger name="Invoicing">
> <level value="FATAL" />
> <appender-ref ref="FileAppenderFatal" />
> </logger>
> <logger name="Invoicing">
> <level value="DEBUG" />
> <appender-ref ref="FileAppender" />
> </logger>
> <!-- Setup the root category, add the appenders and set the default
> level -->
> <appender name="FileAppender" type="log4net.Appender.FileAppender">
> <file value="C:\Log.txt" />
> <appendToFile value="true" />
> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
> <layout type="log4net.Layout.PatternLayout">
> <conversionPattern value="%date [%thread] %-5level %logger
> [%property{NDC}] - %message%newline" />
> </layout>
> </appender>
> <appender name="FileAppenderFatal" type="log4net.Appender.FileAppender">
> <file value="C:\LogFatal.txt" />
> <appendToFile value="true" />
> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
> <layout type="log4net.Layout.PatternLayout">
> <conversionPattern value="%date [%thread] %-5level %logger
> [%property{NDC}] - %message%newline" />
> </layout>
> </appender>
> </log4net>
>
> The only difference between the two was I swapped the positioning of the
> two
> loggers.
> --
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>
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