NHibernate Doesn't Log Errors - nhibernate

Question

I'm getting an NHibernate exception that I want to try to get more info on, but it doesn't seem to be logging errors. I was actually looking to get more granular error info, but discovered the initial problem of not logging errors at all.
Here's my log4net sectionf rom config file:
<log4net>
<appender name="NHibernateAppender" type="log4net.Appender.RollingFileAppender">
<file value=".\\Logs\\NHibernate.log" />
<appendToFile value="true" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10000KB" />
<rollingStyle value="Size" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<header value="[Header]
" />
<footer value="[Footer]
" />
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<appender name="NHibernateSQLAppender" type="log4net.Appender.RollingFileAppender">
<file value=".\\Logs\\NHibernate.Sql.log" />
<appendToFile value="true" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10000KB" />
<rollingStyle value="Size" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<header value="[Header]
" />
<footer value="[Footer]
" />
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<logger name="NHibernate" additivity="false">
<level value="ERROR" />
<appender-ref ref="NHibernateAppender" />
</logger>
<logger name="NHibernate.SQL" additivity="false">
<level value="ERROR" />
<appender-ref ref="NHibernateSQLAppender" />
</logger>
</log4net>
I've tried "ALL" as well; it writes "DEBUG" and "INFO", but no "ERROR" entries. Any suggestions? Thanks!

Answer 1

If you add this into your web.config:
<appSettings>
...
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
And:
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="log.txt" />
</listeners>
</trace>
</system.diagnostics>
This will show up any problems log4net may be having itself, e.g. trying to configure your appenders.