Log 4 net not logging to file - asp.net

Probably a very simple setup, but I've tried to setup Log4Net. In my web.config I have:
<log4net>
<appender name="File" type="log4net.Appender.RollingFileAppender">
<file value="Logs\\Log4Net.log" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd-HHmm" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<logger name="File">
<level value="All" />
<appender-ref ref="LogFileAppender" />
</logger>
<root>
<level value="ALL"/>
<appender-ref ref="FileAppender"/>
</root>
</log4net>
I have added the following to my configsections:
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
The following in global.asax:
log4net.Config.XmlConfigurator.Configure();
The following is on my default.aspx:
ILog alog = log4net.LogManager.GetLogger(typeof(_Default));
log4net.ILog logger = log4net.LogManager.GetLogger("File");
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
SetupSeo();
}
alog.Error("this test");
logger.Error("Front page loaded for ip " + Request.UserHostAddress);
}
What is wrong?

I guess it is a Permission issue. The relevant directory do not have sufficent permissions so that ASP.NET can write to that.
To verify that, Enable log4net internal debugging by adding the below item to the <appSettings> section in the webconfig.
<add key="log4net.Internal.Debug" value="true"/>
Now add the below to the webconfig as well
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add
name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="C:\myLogFolder\log4net.txt" />
</listeners>
</trace>
</system.diagnostics>
Make sure that myLogFolder folder in C drive have permissions so that ASP.NET can write to that. This will write the internal debugging message to this file. Run the app and see what happens.

Related

log4net is not working in Class library

I want to implement logging function into a class library, which is itself referenced in a webapplication. I tried to add app.config and did everything needed, but its not logging any message, log4net simply does nothing.
Here is my app.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net debug="true">
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="D:\StagingPortal2012\Communicationlogs\TestProjlog4net.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="20MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%newline%-5p %d %-22.22c{1} %-18.18M - %m%n" />
</layout>
</appender>
<root>
<appender-ref ref="RollingLogFileAppender" />
<level value="DEBUG"></level>
</root>
</log4net>
<appSettings>
<add key="log4net.Internal.Debug" value="true" />
</appSettings>
</configuration>
And Assembly.Info.cs
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "App.config")]
And Communicator.cs(Where i using log4net for writing log)
private static readonly ILog Log = LogManager.GetLogger(
System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

log4net rolling file appender not working

I have following configuration:
<log4net>
<root>
<level value="All"/>
<appender-ref ref="RollingFileAppender"/>
</root>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="mylog.log"/>
<appendToFile value="true"/>
<preserveLogFileNameExtension value="true"/>
<rollingStyle value="Composite"/>
<datePattern value=".yyyyMMdd"/>
<maximumFileSize value="5MB"/>
<countDirection value="1"/>
<maxSizeRollBackups value="-1"/>
<staticLogFileName value="false"/>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%date [%thread] %-5level %logger - %message%newline"/>
</layout>
</appender>
</log4net>
And the following code in global.asax:
Sub Application_Start()
AreaRegistration.RegisterAllAreas()
RegisterGlobalFilters(GlobalFilters.Filters)
RegisterRoutes(RouteTable.Routes)
BasicConfigurator.Configure();
LogManager.GetLogger(typeof(Global_asax)).Error("Logger configured")
End Sub
For the tag file in configuration above. I have tried C:\my folder\mylog.log as well as what is seen above mylog.log
However, I do not see this file generated anywhere and there are no exceptions.
Environment: VS 2013 ASP.Net VB. Running via Debug menu. When I run IISExpress is started by VS2013 and site runs. but no log is seen.
I have tried various combinations for the file tag but nothing works.
Can someone help please?
This is final version of what I ended up doing that worked:
<log4net>
<root>
<level value="ALL"/>
<appender-ref ref="RollingFileAppender"/>
</root>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs\log4net.log"/>
<datePattern value="yyyy-MM-dd'-FULL.log'" />
<appendToFile value="true"/>
<preserveLogFileNameExtension value="true"/>
<rollingStyle value="Size"/>
<maximumFileSize value="250KB"/>
<maxSizeRollBackups value="-1"/>
<staticLogFileName value="false"/>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%date [%thread] %-5level %logger - %message%newline"/>
</layout>
</appender>
</log4net>
And
XmlConfigurator.Configure()
LogManager.GetLogger(typeof(Global_asax)).Error("Logger configured")
This logged to log\log4net.log in the application directory (i.e. where my code is )
This used to work for me (I've switched to the lighter and better configurable NLog), log rolled daily, was written in a subfolder named "Logs" under the app's path.
<appender name="RollingDebugAppender" type="log4net.Appender.RollingFileAppender">
<file value="Logs\" />
<datePattern value="yyyy-MM-dd'-FULL.log'" />
<staticLogFileName value="false" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<maxSizeRollBackups value="100" />
<maximumFileSize value="5MB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
You should turn on log4net's internal debugging to figure out what's failing...
Sample web.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="C:\log4net_internal.log"/>
</listeners>
</trace>
</system.diagnostics>
</configuration>
More information available here on the troubleshooting section.
*_%date{yyyyMMdd}.log
below is the key, if this is missing u will see logs like above
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="C:\log4net_internal.log"/>
**<staticLogFileName value="false" />**
</listeners>
</trace>
</system.diagnostics>
</configuration>
Adding debug = "true" to the <log4net> tag (i.e. <log4net debug="true"> ) can help to solve the problem

Unrecognized configuration section log4net. web.config website

I use log4net to log the errors in my web application and it works fine. However if I place the same code in website I get error "Unrecognized configuration section log4net"
here is my web.config section
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net" requirePermission="false"/>
<root>
<level value="RELEASE" />
<appender-ref ref="LogFileAppender" />
</root>
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender" >
<param name="File" value="D:\ESSReport\Logs\ESSlog.log" />
<param name="AppendToFile" value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="5" />
<maximumFileSize value="4MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%newline%-5p%d{yyyy-MM-dd hh:mm:ss} [%thread] [%logger] [%line] %newline - %message" />
</layout>
</appender>
I have added dll to my website
You are probably missing configuration section registration.
Here is sample code how you can register custom section:
<configuration>
<configSections>
<sectionGroup name="LoggerConfiguration">
<section name="GPWFLogger" type="GP.Solutions.WF.Entities.LoggerConfiguration,GPWFLogger" allowDefinition="Everywhere" allowLocation="true"/>
</sectionGroup>
</configSections>
<LoggerConfiguration>
<GPWFLogger
ConnectionStringName="ASPNETDB"
LogLevel="Full"
LogPrimaryTarget="SqlServer"
LogFilePath="GPWFwebClient.log" />
</LoggerConfiguration>
Take notice that LoggerConfiguration is registred inside sectionGroup.
You can use this principle in your case.

Does the Log4net SMTPAppender send email Asynchronously?

Does the Log4net SMTPAppender send email asynchronously? If it doesn't, how can I send logging emails asynchronously?
My log4net.config is:
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
</configSections>
<log4net>
<appender name="SMTPAppender" type="log4net.Appender.SMTPAppender">
<authentication value="Basic" />
<to value="xxx#xx.com" />
<from value="yyy#xx.com" />
<username value="yyy#xx.com" />
<password value="yyy" />
<subject value="xxx" />
<smtpHost value="smtp.xx.com" />
<lossy value="true" />
<evaluator type="log4net.Core.LevelEvaluator">
<threshold value="WARN" />
</evaluator>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%newline%date [%thread] %-5level %logger %newline %message%newline%newline%newline" />
</layout>
</appender>
<root>
<level value="INFO"></level>
</root>
<logger name="MyLogger">
<level value="INFO"></level>
<appender-ref ref="SMTPAppender"></appender-ref>
</logger>
</log4net>
</configuration>
You could just call the logging method asynchronously like this:
Task.Factory.StartNew(() => log.Info("Message I want to email"));
I actually got this suggestion from the following SO article:
How do I create an asynchronous wrapper for log4net?
There is a simple workaround before the solid solution is released.
public class SmtpAsyncAppender : SmtpAppender
{
protected override void SendEmail(string messageBody)
{
Task.Run(() => base.SendEmail(messageBody));
}
}
It presumes that SmtpAppender.SendEmail is thread-safe and reenterable. It is for log4net v1.2.13.0 and there is no reason not to be in the future.
Log4net has not built in appender that is asynchronous. If you need that functionality you need to write your own appender. Downloading the log4net source code should get you started...

Can't get Log4Net to work in my ASP.NET website :(

really simple question -> i can't seem to get any data from Log4Net in my ASP.NET application. I've got a simple ASP.NET website, which references a class library. In this class library, I have some lines that call the logger.
I'm trying to read the log4net output data in my Visual Studio 2008 debugging Output window.
Here's my code and my configuration...
//Class Library project
//File: Foo.cs
public class FooService
{
private static readonly ILog log = LogManager.GetLogger(typeof(FooService));
public FooService()
{
// NOTE: To play with my L4N settings, I'll call Debug once, then Info once.
log.Info("Starting Constructor");
// ... snip ...
log.Debug("Leaving Constructor");
}
}
// ASP.NET Website project
// File: global.asax
void Application_Start(object sender, EventArgs eventArgs)
{
log4net.Config.XmlConfigurator.Configure();
}
// File: Whatever.aspx.cs
// A delegate method (when a user clicks a button) creates the FooService() instance.
// File: web.config
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler" requirePermission="false" />
// ....
</configSections>
<log4net>
<appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
<mapping>
<level value="ERROR" />
<foreColor value="White" />
<backColor value="Red, HighIntensity" />
</mapping>
<mapping>
<level value="DEBUG" />
<backColor value="Green" />
</mapping>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout" value="%date [%thread] %-5level %logger - %message%newline" />
</appender>
<appender name="OutputDebugStringAppender" type="log4net.Appender.OutputDebugStringAppender">
<mapping>
<level value="ERROR" />
<foreColor value="White" />
<backColor value="Red, HighIntensity" />
</mapping>
<mapping>
<level value="DEBUG" />
<backColor value="Blue" />
</mapping>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="App_Data\logging\log-append.txt"/>
</appender>
<!-- Setup the root category, add the appenders and set the default level -->
<root>
<level value="ALL" />
<appender-ref ref="OutputDebugStringAppender" />
<appender-ref ref="ConsoleAppender" />
<appender-ref ref="ColoredConsoleAppender" />
</root>
<!-- Specify the level for some specific categories -->
<logger name="DotNetOpenAuth">
<level value="ALL" />
</logger>
</log4net>
Cheers for any help or suggestions...
EDIT: Added the RollingLogFileAppender.
I had this same problem and I think it was looking at the wrong web.config or something. I finally separated out log4net.config from web.config and put a path to it \inetpub\Logs\log4net.config and all is well.
UDPATED ON REQUEST: edited from a slightly more complicated version.
<?xml version="1.0" encoding="utf-8"?>
<log4net>
<appender name="TraceAppender" type="log4net.Appender.TraceAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level (%logger:%line) - %message%newline" />
</layout>
</appender>\
<root>
<!--ALL, DEBUG, INFO, WARN, ERROR, FATAL, OFF-->
<level value="ALL" />
<appender-ref ref="TraceAppender" />
</root>
</log4net>
And it is configured in code as follows:
var logpath = WebConfigurationManager.AppSettings["LogConfigPath"] ?? #"\Inetpub\Logs\log4net.config";
var finfo = new System.IO.FileInfo ( logpath );
XmlConfigurator.Configure( finfo );
ASP.Net has restriction on usage of filesystem access, so try to explicitly point directory under App_Data (were it is allowed)
Here my working sample:
<log4net>
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="App_Data\logging\log-file.txt"/>
Or with rollover
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="App_Data\logging\log-append.txt"/>
Ok, found the answer. I needed to use a TraceAppender.
The application configuration file
can be used to control what listeners
are actually used. See the MSDN
documentation for the Trace class for
details on configuring the trace
system.
Events are written using the
System.Diagnostics.Trace.Write(string,string)
method. The event's logger name is
passed as the value for the category
name to the Write method.
Here's my config file data...
<log4net>
<appender name="TraceAppender" type="log4net.Appender.TraceAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<!-- Setup the root category, add the appenders and set the default level -->
<root>
<level value="ALL" />
<appender-ref ref="TraceAppender" />
</root>
</log4net>
There are atleast 2 possible problems:
The way the address to the file is specified, try using an absolute path instead.
The process making the call needs rights to modify the file. Check that the user account making writing to the log file has rights to do so.
To debug it I would create and empty directory, give everyone full control, configure to log to that directory. Then test it, see that it works, then gradually tighten the security to an acceptable level.
I added the following line Global.asax file, and it works..!!
log4net.Config.XmlConfigurator.Configure();

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