Using version 1.2.11. Logging works on my dev machine, but won't create the directory or log when deployed.
I tried:
giving full directory access to IUSR, Everyone, local users.
running the app pool as a local admin account.
to use internal debugging as Phil Haack describes here.
Stopped and started the app pool after each change.
Nothing is produced in the output file.
My log4Net config is below. Any thoughts on what to try next?
<?xml version="1.0"?>
<log4net debug="true">
<appender name="file" type="log4net.Appender.RollingFileAppender">
<file value="..\Logging\log.txt" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<datePattern value="yyyyMMdd" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="1MB" />
<threshold value="DEBUG" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<appender name="console" type="log4net.Appender.DebugAppender">
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] <%X{auth}> - %m%n" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="file" />
<appender-ref ref="console" />
</root>
</log4net>
If the directory and the file is not being created, then most likely, the configuration is not being read (and therefore used) at runtime.
I always forget to add the single line of code for Log4net that hooks up the configuration. This code usually appears in the bootstrap class in the application (e.g. Global.asax for an ASP.NET app).
XmlConfigurator.Configure(new System.IO.FileInfo(configFile)); // configFile being the path to the file.
Instead of the above in-line, you can add this attribute to the AssemblyInfo.cs file:
[assembly: log4net.Config.XmlConfigurator(Watch = true)]
Either way, this will wire up log4net. More information is found in the Manual Configuration section of the log4net docs.
If you're using IIS, make sure the correct group has modify access to the Logs folder (usually IIS_USERS).
Sounds like a permissions issue to me. I almost always use a directory where I don't have to enable any special permissions for the applications to write the log files to.
Here is what I generally use with log4net:
<file type="log4net.Util.PatternString" value="${ALLUSERSPROFILE}/<Company Name>/Logs/<Program Name>/<Log file name>.txt" />
Of cource you'll need to substitute Company Name, Program Name and Log file name in the above with actual values.
This will write to the ProgramData folder where access is typically not restricted. You can navigate to this folder in File Explorer by typing %ProgramData% or %AllUsersProfile%
Another thing I like about this method is that it works on nearly every microsoft O/S. XP, Vista, 7, 8
You probably do not know where you are logging:
<file value="..\Logging\log.txt" />
Will is derived from your running directory, which is iis its directory. You can better use a full path like:
<file value="c:\Logging\log.txt" />
Then you can give the right access rights to the logging directory. Log4net will not create any directories as far as I know. So you have to create the c:\logging directory first.
Non of the answers worked for me until I put these lines to the web.config app settings:
<add key="log4net.Config" value="Log.config" />
<add key="log4net.Config.Watch" value="True" />
Related
I am using log4net for to create logs of my app. One of my client reported that from few days on logs are not writing to log text file. When I go thorough the issue I found that Logs are logged to given location for few seconds and then log path automatically changing to installation folder and then continue.
My config is like this
<appender name="MessageRollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="Logs\log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<encoding value="utf-8" />
<maxSizeRollBackups value="2" />
<maximumFileSize value="5MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%message%newline%newline" />
</layout>
</appender>
Predefined log path is set to
C:\Users\testuser\AppData\Roaming
If I change the log.txt path to the Downloads folder. There will be no issue.
I checked. There are no permission issues. Like I said logs happen to write for few seconds.
There were no errors in the app. This is c# standalong app. Why this path chaning happen?
Check if the root tag of logger is pointed to your appender name,
<root>
<level value="ALL"/>
<appender-ref ref="MessageRollingFileAppender"/>
</root>
Also, Make sure you check the size of the file that is getting generated, if more logs are written (happens when application starts throwing error and you are logging all exception details) then that could be problem to handle there may be by limiting the log level to only needed error messages.
As a second check, examine if you have configured your logger path to correct log4net config file.
I am trying to make log4net create it's log files in a folder structure, but so far I'm not successful.
What I'd like to accomplish is that log4net creates log files like this:
..\log\2017\10\30-10-2017_eva360Recorder.log
..\log\2017\10\31-10-2017_eva360Recorder.log
..\log\2017\11\01-11-2017_eva360Recorder.log
..\log\2017\11\02-11-2017_eva360Recorder.log
In my app.config I now have the following:
<!-- Log4net Logging Setup -->
<log4net>
<root>
<level value="ALL" />
<appender-ref ref="LogFileAppender" />
</root>
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender, log4net">
<file type="log4net.Util.PatternString" value="log\\%date{yyyy}\\%date{MM}\\%date{dd-MM-yyyy}_eva360Recorder.log" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<maxDateRollBackups value="60" />
<datePattern value="dd-MM-yyyy" />
<preserveLogFileNameExtension value="true"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger %M - %message%newline" />
</layout>
</appender>
</log4net>
This, however, results in the following:
d:\Eva360\Recorder\log\2017\10\31-10-2017_eva360Recorder.log
d:\Eva360\Recorder\log\2017\10\31-10-2017_eva360Recorder31-10-2017.log
As you can see, this is not what I wanted. It did not create a month folder (..\2017\11..) and also did not change the name of the log file, but added a date within the file name.
Is what I want even possible?
If so, how should I do that?
And also importantly, where is this to be found in the documentation of log4net?
I realise that this conjecture, rather than a definitive answer, but this could probably be achieved through the use of a custom log4net appender. See IAppender in the log4net SDK.
Google is chock full of articles about creating custom log4net appenders, so no need to repeat anything here.
I am using sharpdevelop to create a console application in C#. I have added in the reference for log4net and I added my logging statements while I was writing the code but I never looked at the log file. Now I am done with the code I need to get the log file working. My program runs fine, even the logging statements, but I can't find the log file.
I have tried to cobble together a couple of examples on getting log4net working. I have the lines to read from the configuration and then to instantiate the object, these are the first lines in my program to run:
log4net.Config.XmlConfigurator.Configure();
ILog datalogger = LogManager.GetLogger("myLog"); //initiate the data logger
Then in various places throughout the code I have this:
datalogger.Info(DateTime.Now.ToString() + ": using file: " + ProDirectory.ToString() + #"\" + myProFile.ToString());
I have also put the following in my app.config file:
<appender name="myLogAppender" type="log4net.Appender.RollingFileAppender" >
<file value="myLog.log" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %level - %message%n" />
</layout>
</appender>
<logger name="myLog">
<level value="All"></level>
<appender-ref ref="myLogAppender" />
</logger>
No matter what I do, I can't see the log file being produced. I have changed the directory and even paused the program to see if I could find a handle open to the log file. Each time I come up empty. Not sure what I could be doing wrong.
not sure if this will help. I also had hard times making log4net work in different scenarios.
I use log4net root xml node to specify the appender. hope it will help.
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="250KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingFileAppender" />
</root>
UPDATE
You might also want to check Visual Studio output log. First setup the output log to log "ALL" (somewhere in VS settings). Then you should see exact error message of log4net in the output window of Visual Studio.
Whenever I have had issues with log4net creating the log file, it usually wound up being a file / directory permissions issue.
Change your <file value="log.txt" /> to something that you know will be accessible by the current user / process running devhost.
For example: <file value="%USERPROFILE%\Documents\log.txt" /> will create a log file in the user's My Documents folder. This is a folder that the user has permissions to write data to, and shouldn't give you any troubles with.
For more information on special folder values, see this link.
Looks like I just had to clean up my XML a little, after I did the log file is working fine:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections> <!-- Level 1 -->
<section name="log4net"
type="log4net.Config.Log4NetConfigurationSectionHandler,
log4net"/> <!-- Level 2 -->
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
</startup>
<log4net>
<appender name="myLogAppender" type="log4net.Appender.RollingFileAppender" >
<file value="myLog.log" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %level - %message%n" />
</layout>
</appender>
<logger name="myLog">
<level value="All"></level>
<appender-ref ref="myLogAppender" />
</logger>
</log4net>
</configuration>
I would like to set the full path and the file name for the log file (I use log4net) and I would like to use the c:\ProgramData\Logs folder. I get the path of the ProgramData folder using the environment variable #PROGRAMDATA#.
I would like to set the path for the log file in the next way: I use a property in the App.config, and I set the value for this property in the class where I do the loggings.
My App.config file:
<configuration>
...
<log4net>
<appender name="Console" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout">
<!-- Pattern to output the caller's file name and line number -->
<conversionPattern value="%5level [%thread] (%file:%line) - %message%newline" />
</layout>
</appender>
<appender name="AppRollingFile" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="%property{ProgramDataPath}\Logs\Application.log" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<appendToFile value="true" />
<maximumFileSize value="1000KB" />
<maxSizeRollBackups value="5" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="[%-5level][%d{yy-MM-dd HH:mm:ss,fff}] %m%n" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="Console" />
<appender-ref ref="AppRollingFile" />
</root>
</log4net>
</configuration>
And the code where I set the property:
static void Main(string[] args)
{
log4net.GlobalContext.Properties["ProgramDataPath"] = Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);
log4net.Config.XmlConfigurator.Configure();
My problem is that an empty log file is created before the value of the property is set (then the property it is null). The initialization of the log4net it is done before entering in the main function of the class where I set the property, so it will always be created an empty file in the application's folder: bin\Debug(null)\Logs\Application.log. After I set the property, everything works fine, because another Apllication.log file will be created in c:\ProgramData\Logs folder.
My question is that how can I set the value of the property before the empty log file is created/before entering in the main function of the class where I set the property, or what other solution is there?
Using the environment variable in the App.config as it is shown below did not work.
<file type="log4net.Util.PatternString" value="${PROGRAMDATA}\Logs\Application.log"/>
Try
<file type="log4net.Util.PatternString" value="${ProgramData}\Logs\Application.log"/>
The environment variables are case sensitive, which is why ${PROGRAMDATA} does not work.
Removing the assembly attribute should fix the problem:
[assembly: log4net.Config.XmlConfigurator(Watch=true)]
If you want log4net to watch app.config for configuration changes, use this code (I prefer to put log4net configuration in a separate log4net.config file for easier reuse):
log4net.GlobalContext.Properties["ProgramDataPath"] = Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);
FileInfo configFile = new FileInfo(Process.GetCurrentProcess().MainModule.FileName + ".config");
log4net.Config.XmlConfigurator.ConfigureAndWatch(configFile);
In my application, I include 3 libraries:
Log4net
Common.Logging.log4net
Quartz (use Common.Logging.log4net to write logs)
This is my log4net section config:
<log4net>
<root>
<level value="ALL" />
<appender-ref ref="FileAppender" />
</root>
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="quartz.log" />
<appendToFile value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline" />
</layout>
</appender>
</log4net>
Everything is ok but having a problem about XmlConfigurator.Configure(). This command are called 2 times by order:
Called when init application -> I write log.
Called when starting Quartz. (I verified when to read source codes Common.Logging.log4net) -> Quartz write log.
After Quartz started, my logs was cleared because of XmlConfigurator.Configure(). This means that when calling this command, log will be cleared. I don't want my log is cleared after this command called in a process.
I can get source dll Common.Logging.log4net to change code to check whether log4net is really configured yet, and calling XmlConfigurator.Configure() if not. But I don't like this solution.
Please help me to find another solution without change codes in DLL library.
More info: http://neilkilbride.blogspot.com/2008/04/configure-log4net-only-once.html
You have configured that the file appender creates a new log file when log4net is reconfigured:
<appendToFile value="false" />
Change this to:
<appendToFile value="true" />
The log messages will be appended at the end of file, even if you call XmlConfigurator.Configure() multiple times.