I've been running into this lately. One of the items is to make sure your
have permissions to the event log to write with.
Check the HKLM\System\CurrrentControlSet\EventLog and make sure whatever
user your process (if WinForms the logged on user or if ASP the
website/webservices' AppPool user) has write permissions to it.
My appender looks like the following (although the appender config is from a
slightly older version of log4net):
<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
<param name="LogName" value="Application"/>
<param name="ApplicationName" value="AppName"/>
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="Header" value="[Log Header]\r\n"/>
<param name="Footer" value="[Log Footer]\r\n"/>
<param name="ConversionPattern" value="%c%n[%-5p] %d{ISO8601} .%m%n %x"/>
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="ERROR" />
<levelMax value="FATAL" />
</filter>
</appender>
----- Original Message -----
From: "Billy Barnum" <[EMAIL PROTECTED]>
To: "'Log4NET User'" <[email protected]>; "'Matthew Brown'"
<[EMAIL PROTECTED]>
Sent: Tuesday, October 11, 2005 5:20 PM
Subject: RE: Inability to use EventLogAppender with ASPNET
Try removing your line:
<logName value="Application"/>
I think what you're doing there is naming a custom EventLog with the same
name as the existing Application log, which in turn requires write access to
the registry. Just remove that line and see what happens.
-BillyB
WILLIAM BARNUM
[EMAIL PROTECTED]
________________________________________
From: Matthew Brown [mailto:[EMAIL PROTECTED]
Sent: Monday, October 10, 2005 1:43 PM
To: Log4NET User
Subject: Inability to use EventLogAppender with ASPNET
With log4net internal debugging turned on, an attempt to create an
EventLogAppender for a web application is failing:
[3616] log4net: XmlHierarchyConfigurator: Setting Property [Layout] to
object [log4net.Layout.PatternLayout]
[3616] log4net: XmlHierarchyConfigurator: Setting Property [LogName] to
String value [Application]
[3616] log4net:ERROR XmlHierarchyConfigurator: Could not create Appender
[EventLog] of type [log4net.Appender.EventLogAppender]. Reported error
follows.
[3616] System.Security.SecurityException: Requested registry access is not
allowed.
[3616] at Microsoft.Win32.RegistryKey.OpenSubKey(String name, Boolean
writable)
[3616] at System.Diagnostics.EventLog.FindSourceRegistration(String
source, String machineName, Boolean readOnly)
[3616] at System.Diagnostics.EventLog.SourceExists(String source, String
machineName)
[3616] at System.Diagnostics.EventLog.SourceExists(String source)
[3616] at log4net.Appender.EventLogAppender.ActivateOptions()
[3616] at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlEleme
nt appenderElement)
[3616] log4net:ERROR XmlHierarchyConfigurator: Appender named [EventLog] not
found.
[3616] log4net: XmlHierarchyConfigurator: Hierarchy Threshold []
[3616] log4net: AppenderSkeleton: Finalizing appender named [EventLog].
The FAQ on the log4net site says that the ASPNET account has permission to
write to the event log if created already. Just to be sure, I made sure to
add ASPNET and IUSR_machinename to the Administrators group, but this does
not work either.
Here is my configuration:
<appender name="EventLog" type="log4net.Appender.EventLogAppender" >
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date
[%thread][%mdc{AspNetSessionID}] %-5level %logger - %message%newline" />
</layout>
<logName value="Application"/>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="LogFileAppender" />
<appender-ref ref="EventLog" />
</root>
Sorry if this is a silly newbie question, but I couldn't find much out there
on configuring/using EventLogAppender besides "its tough". Can anyone help?
Thanks,
Matt Brown
