logging-log4net-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From George Chung <geo...@glympse.com>
Subject Re: [jira] [Commented] (LOG4NET-178) Log4Net stops logging after appdomain recycle of aps.net2.0 application
Date Fri, 26 Oct 2012 19:48:17 GMT
OK, I don't do anything special that I do in my code except set the AppName.

Here's what you'll want to do.

Set this in your Web.Config

    <add key="log4net.Internal.Debug" value="true"/>

If this setting is false, which is the default, log4net will silently
swallow any exceptions before returning to your code. If it's set to true,
then log4net still swallows the exceptions, *but reports them*. If you run
your ASP.NET app in the debugger and you have configured a TraceAppender,
you'll see log4net output in the Output window. While still in the
debugger, touch your web.config, thus forcing the AppDomain to reload the
app. Note, you'll still be in the debugger. Visit a page hosted by your
ASP.NET app to cause your Application_Startup() to execute. Execute
something that you know will trigger a log4net log event. At this point, if
log4net is having problems, you'll see gobs of log4net output in the Output

I used this technique to figure out why my ASP.NET app was not logging in
release mode. Well, it's because I configured log4net to capture line
numbers. Well, line numbers don't exist in release builds. By using the
above technique, I was able to see that I was getting an exception trying
to insert an empty string into an integer column in my configured

On Fri, Oct 26, 2012 at 12:34 PM, George Chung <george@glympse.com> wrote:

> I know I explicitly initialize some log4net setting in
> Application_Startup. Let me look it up.
> On Thu, Oct 25, 2012 at 11:45 PM, Dominik Psenner (JIRA) <jira@apache.org>wrote:
>>     [
>> https://issues.apache.org/jira/browse/LOG4NET-178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484745#comment-13484745]
>> Dominik Psenner commented on LOG4NET-178:
>> -----------------------------------------
>> I am no expert on IIS web applications, but it would look like a
>> misconfigured log4net configuration and/or a missing initialization. If
>> logging starts by changing the web.config, log4net is "watching" for
>> changes in the web.config and respawns the appenders when that happens.
>> This means that either:
>> * log4net gets never started
>> * log4net gets stopped and not restarted
>> Thus - in theory - adding an initialization in the right spot alike the
>> one in comment
>> https://issues.apache.org/jira/browse/LOG4NET-178?focusedCommentId=13127649&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13127649could
fix the issue.
>> > Log4Net stops logging after appdomain recycle of aps.net2.0 application
>> > -----------------------------------------------------------------------
>> >
>> >                 Key: LOG4NET-178
>> >                 URL: https://issues.apache.org/jira/browse/LOG4NET-178
>> >             Project: Log4net
>> >          Issue Type: Bug
>> >          Components: Appenders
>> >    Affects Versions: 1.2.10
>> >         Environment: Windows server 2003
>> >            Reporter: Richard Nijkamp
>> >             Fix For: 1.2 Maintenance Release
>> >
>> >
>> > Dear sir/madam,
>> >  We are using Log4Net 1.2.10. We encounter the problem that Log4net
>> doesn't continue logging after an event that triggers an appdomain
>> recycle/restart.
>> >  In the global.asax we start the logging with:
>> >  private static readonly ILog log =
>> LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
>> > Logging works flawless when the application is started for the first
>> time. After sometime it might occur that the appdomain gets recycled due to
>> inactivity of the web application. We use the following code in
>> Application_end():
>> > log.Info("*** Application end ***");
>> > log4net.LogManager.Shutdown();
>> > After this function the application gets restarted and the
>> Application_start() method executes and writes new lines to the log. The
>> problem is that the log4net doesn't write the new lines after the restart.
>> Could you explain why log4net might stop working after an appdomain restart
>> of an asp.net2.0 web application? If I want log4net to work properly again
>> I need to restart IIS manually.
>> >  Looking forward to your reply.
>> > Best regards,
>> > Richard Nijkamp
>> --
>> This message is automatically generated by JIRA.
>> If you think it was sent incorrectly, please contact your JIRA
>> administrators
>> For more information on JIRA, see: http://www.atlassian.com/software/jira

View raw message