Had something weird start happening to me today. I have an asp.net mvc app with log4net setup and everything had been working fine. Something must have changed somewhere and now nothing is getting logged (no log file is being created).
Here's my global.asax.cx
protected void Application_Start()
{
log4net.Config.XmlConfigurator.Configure();
}
Here's my configuration in my web.config:
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<log4net>
<appender name="FileAppender" type="log4net.Appender.RollingFileAppender">
<file value="c:\logs\api\ApiLog.txt" />
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="FileAppender" />
</root>
</log4net>
For some reason the c:\logs\api\apilog.txt file never gets created. However, if I change my application_start method to this it works fine:
log4net.Config.XmlConfigurator.Configure(new FileInfo("DirectPathToMy\web.config"));
Any ideas why calling Configure() is not finding the configuration in my web.config by default?
Don't know why your approach don't work but the issue is that you need to make sure it is activated in your project.
I usually put this as an assembly level reference in my AssemblyInfo.cs under /Properties:
[assembly: log4net.Config.XmlConfigurator()]
Reference:
http://logging.apache.org/log4net/release/manual/configuration.html
Related
I have created a solution which consist of class library, MVC web application and console application.
For my class library project is actually responsible to perform logging using log4net which is also included the log4net configuration in the log4net.config. Currently i am facing a problem which the logging is not working when my web application call the logging function from class library. But it's working fine when my console application. My log4net.config looks as below:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<log4net>
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="C:\\Temp\" />
<datePattern value="'Test.log_'yyyy-MM-dd'.log'" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<appendToFile value="true" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout, log4net">
<conversionPattern value="%date [%thread] %-5level %logger [%method] - %message%newline" />
</layout>
</appender>
<root>
<level value="INFO" />
<appender-ref ref="RollingLogFileAppender" />
</root>
</log4net>
</configuration>
I have also included the line below in my class library [AssemblyInfo.cs]
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]
My sample class library function as below:
private static readonly log4net.ILog log =
log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
public void Write ()
{
log.Info("Success");
}
I have set the log4net.config Copy to Output Directory to Copy always.
Sample log4net output from console application [Test.log_yyyy-MM-dd.log]:
2019-10-01 12:07:48,923 [1] INFO ClassLibrary2.Class1 [Write] - Success
But there is log file generated for MVC web application. Is there any additional step need to configure for the web application?
I would be grateful for any help with it.
Thanks.
Did you add something in your Application_Start method? (global.asax) like:
string l4net = Server.MapPath("~/log4net.config");
log4net.Config.XmlConfigurator.ConfigureAndWatch(new System.IO.FileInfo(l4net));
Try To Add ConfigSections in your web.config. Also there's the guide especially for MVC applications.
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
Complete Guide
I'm struggling with Log4Net for a good while now. I have followed this post
as an example. The difference is, in my case, I have two separate projects, one with all objects that interacts with WebDriver and web elements (FrameworkProject), second is actual test project(TestProject). I have read a lot and I'm almost sure I have set it correctly...
FrameworkProject assembly file includes [assembly: log4net.Config.XmlConfigurator(Watch = true)]
My Log4Net.config file is as follow:
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<root>
<level value="ALL" />
<appender-ref ref="MyAppender" />
<appender-ref ref="MyFileAppender" />
</root>
<appender name="MyAppender" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %level %logger - %message%newline" />
</layout>
</appender>
<appender name="MyFileAppender" type="log4net.Appender.FileAppender">
<file value="application.log" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %level %logger - %message%newline" />
</layout>
</appender>
</log4net>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
</configuration>
When I debug my SpecFlow tests and I reach the line XmlConfigurator.Configure(); (look example above) I'm still getting
log4net:ERROR Failed to find configuration section 'log4net' in the application's.
This drops me mad now and I have no clue of what might be wrong. Could this be the cause of running test?? Note: I have log4net set up ONLY in FrameworkProject
I have log4net set up ONLY in FrameworkProject
That's the problem. Roughly speaking, your "entry point" during test execution is your Test Project, hence it's looking for log4net configuration section inside of "entry point's" application configuration file (Test Project's app.config). Thus you should move your log4net configuration to Test Project's application configuration file.
On a second notice, it looks like you don't need to call XmlConfigurator.Configure if you use assembly level attribute: 1, 2.
I'm getting started with log4net.I'm working on a small console project in which i must implement this framework.
At the beginning i created a small console project to see how it works without any other code.
I managed to make it work properly.
Now i try to migrate all the code in my application and i get this error when i execute the .exe of my console application:
"ERROR failed to find configuration section "log4net" in the application's .config
file.Check your .config file for the <log4net> and <configSections> elements. The
configuration section should look like : <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler.log4net"/>
The code:
public class Program
{
private static readonly log4net.ILog log = log4net.LogManager.GetLogger
(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
public static void Main(string[] args)
{
log4net.Config.XmlConfigurator.Configure();
ILog log = log4net.LogManager.GetLogger(typeof(Program));
...
The app.config didn't exist yet so its content is the same as the test project i did:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net" />
</configSections>
<log4net>
<appender name="FileAppender" type="log4net.Appender.FileAppender,log4net">
<file value="D:\WEB\SAI\log\nas\log.txt" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline" />
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="INFO" />
<levelMax value="FATAL" />
</filter>
</appender>
<root>
<level value="INFO"/>
<appender-ref ref="FileAppender"/>
</root>
</log4net>
</configuration>
After some searches on internet, i added:
[assembly: log4net.Config.XmlConfigurator()]
to my AssemblyInfo.cs as it was suggested but the result is still the same...
Thanks in advance for your help
ADD
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]
in AsseblyInfo.cs
First time playing with Log4Net and I'm running into trouble. I've followed various tutorials but I've been unable to get it to log anything out. Let me show you my code and hopefully you can tell me what I'm doing wrong.
app.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net"
type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="CurrentLog.txt"/>
<staticLogFileName value="true"/>
<appendToFile value="true"/>
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd"/>
<filter type="log4net.Filter.LevelRangeFilter">
<acceptOnMatch value="true" />
<levelMin value="DEBUG" />
<levelMax value="FATAL" />
</filter>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date{dd MMM yyy HH:mm:ss} %level %message. %newline %exception" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="RollingFileAppender" />
</root>
</log4net>
</configuration>
AssemblyInfo.cs
[assembly: log4net.Config.XmlConfigurator(Watch=true)]
Presenter.cs
At the top of the class I have this:
private static readonly ILog log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
Then I try to use the log variable later in the class:
bool isDebugEnabled = log.IsDebugEnabled;
log.Debug("Failed to save", e);
Whenever I inspect the isDebugEnabled variable, it is false, as are all of the other isBlahEnabled if I inspect the log variable.
My suspicion is that I have not hooked up my app.config file correctly because this is the first time I have tried to use one. I created by right clicking on the project in solution explorer, adding a new item, choosing Application Configuration File and naming it app.config.
This one works for me:
app.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<log4net>
<appender name="Main" type="log4net.Appender.RollingFileAppender">
<file value="${USERPROFILE}\My Documents\MyApp\Logs\Main.log" />
<appendToFile value="false" />
<maximumFileSize value="1GB" />
<maxSizeRollBackups value="3" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date{ABSOLUTE} %-5level %-18logger %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="Main" />
</root>
</log4net>
</configuration>
Also be sure the build action on app.config is set to None and Copy to output dir is set to "Copy if newer". You can set these settings in the file properties.
Program.cs
public static ILog Log;
static void Main(string[] args)
{
// Setup Logging
log4net.Config.XmlConfigurator.Configure();
Log = LogManager.GetLogger("MyAwesomeApp");
// ...
}
Just to add my 2 cents: I had the same Problem, but I use the above config in separate log4net.config (so I have on all apps the same config), but I simply forgot to set the file property on build 'Copy when newer' (or similar wording, have German Version).
Just to add my 2p in case this helps anyone else searching for a resolution to this problem:
In my case I was using the NServicebus.Logging package in addition to Log4net, and this package contains types with the exact same names as those in Log4net, differing only in the namespace.
Fixing the 'using' statements or fully-qualifying the type names resolved it, but it was very hard to spot the problem.
I want to implement logging function into a class library, which is itself referenced in a webservice. I tried to add app.config and did everything needed, but it seems that when an exception is thrown, log4net simply does nothing.
my app.config
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="D:\\mylogfile.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="5" />
<maximumFileSize value="10MB" />
<staticLogFileName value="true" />
<filter type="log4net.Filter.StringMatchFilter">
<stringToMatch value="test" />
</filter>
<filter type="log4net.Filter.StringMatchFilter">
<stringToMatch value="error" />
</filter>
<filter type="log4net.Filter.DenyAllFilter" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline%exception" />
</layout>
</appender>
<root>
<level value="INFO"/>
<appender-ref ref="RollingFileAppender"/>
<appender-ref ref="ConsoleAppender" />
</root>
</log4net>
in AssemblyInfo.cs:
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "app.config")]
in LogManager.cs:
private static readonly ILog Log = log4net.LogManager.GetLogger
(MethodBase.GetCurrentMethod().DeclaringType);
public static void WriteLog(Exception ex)
{
Log.Error(ex);
}
Can you please tell me what's wrong? How can I get log4net working for my class library?
Thank you
At runtime, config file is always used from host application, unless declared explicitly. Here in case, web.config is being used not app.cofig. Rather mention some other custom config file name and ensure that file is copied in virtual directory of web service. Also as chibacity said, ensure permission on log file. Better keep it in app_data folder for web service host.
You could use some kind of injection, either you build a simple one like:
public interface ILogger
{
void LogInfo(string message);
.
.
.
}
And then you just inject something that matches that interface, like a wrapper for log4net or such.
But, I think the most correct thing is to not log in the class library. Why I think so is because the library itself is not the application, your web service is so your web service should decide what to log. If you want to log exceptions just don't catch them in the class library and let your web service handle the logging. This will also make it easier to centralize the logging.
Please see my answer to the following question:
Use log4net in SDK
It has a log configuration routine that will construct a complete path to a log4net config file. As you are in a webservice it my not be looking where you expect for "app.config".
Also make sure that you have permission to write to "D:\mylogfile.txt" from your webservice.