I have the following log4net 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="%date [%thread] %-5level %ndc - %message%newline" />
</layout>
</appender>
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="C:/logs/mysystem.log" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<maximumFileSize value="1024MB" />
<maxSizeRollBackups value="30" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level - %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="Console" />
<appender-ref ref="RollingFile" />
</root>
in the local machine it works fine, but when I deploy the web site to the remote server (IIS 6.0) it does not create the log file despite the fact that the system is running.
The AppPool identity is configured to "Network Service".
Any idea?
When the application pool is configured to "Network Service" it does not have sufficient permissions to write to the file system, therefore the log file does not created.
Configure the identity of the app pool to "Local System", it will work fine!
You can grant access "Network Service" access to the logs folder by create a ACE on the folder using the machines name as the principle. Changing the pool identity to "Local System" can have undesirable effects so I would avoid that.
Another approach is to create a domain user and add this user to the machine IIS_WPG group. Change the pool identity to use this user. You can then grant appropriate folder access to this user.
Related
Hi I have created a custom log4net appender and I can get the appender to work in a console application. However when I try and use the appender in a MVC web app or even in an ASP.NET web app it fails to run the appender.
The log4net config is in a separate file.
Here is the config:
<appender name="AsynchronousLog4NetAppender" type="Custom.ErrorLogger.CustomErrorLogger, CustomErrorLogger">
<file value="App_Data\Logs\Trace.%property{log4net:HostName}.log" type="log4net.Util.PatternString" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
<encoding value="utf-8" />
</appender>
I have made sure that the IIS user has full control on the directory and still does not work. If I use a standard appender everything works. I have checked this post (log4net with ASP.NET MVC: nothing happens).
TIA
Graham Harris
I have .NET 4.5.2 Web API 2 application on IIS 8 server which uses log4net (1.2.13.0) for logging. I'm also using Windsor Castle. The problem is that log4net logging is working fine on production server for days, even weeks. But then, for unknown reason, it stops writing anything to log file. My log4net configuration is following:
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<appender name="TextFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="C:\Logs\MyApplication.log" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %level %property{Guid} - %message%n" />
</layout>
</appender>
<appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">
<to value="toaddress#domain.com" />
<from value="noreply#domain.com" />
<subject value="MyApplication production environment - ERROR" />
<smtpHost value="my.smtp.server.com" />
<bufferSize value="1" />
<lossy value="false" />
<evaluator type="log4net.Core.LevelEvaluator">
<threshold value="ERROR" />
</evaluator>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="ERROR" />
<acceptOnMatch value="true" />
</filter>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %level %property{Guid} - %message%n" />
</layout>
</appender>
<root>
<level value="All"></level>
<appender-ref ref="TextFileAppender" />
<appender-ref ref="SmtpAppender"/>
</root>
</log4net>
</configuration>
I first tried setting write permissions to the Logs-folder for IIS accounts - without any effect. I first suspected this since this is customer's server and it's possible that some admin was messing around with folder permissions. Then I set log4net internal debugging on with following settings:
<appSettings>
<add key="log4net.Internal.Debug" value="true"/>
<appSettings>
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add
name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="log4net.txt" />
</listeners>
</trace>
</system.diagnostics>
It writes log4net.txt file, and everything seems to be in order. Some example from the internal log:
log4net: Searched for existing files in [C:\Logs]
log4net: curSizeRollBackups starts at [0]
log4net: [.2016-05-26] vs. [.2016-05-30]
log4net: Initial roll over to [C:\Logs\MyApplication.log.2016-05-26]
log4net: Moving [C:\Logs\MyApplication.log] -> [C:\Logs\MyApplication.log.2016-05-26]
log4net: curSizeRollBackups after rollOver at [0]
log4net: Opening file for writing [C:\Logs\MyApplication.log] append [True]
log4net: Created Appender [TextFileAppender]
log4net: Adding appender named [TextFileAppender] to logger [root].
log4net: Loading Appender [SmtpAppender] type: [log4net.Appender.SmtpAppender]
As you can see, there was 4 days gap when logs were not written. But now the strange thing. The logging is now also successfully written to C:\Logs\MyApplication.log file, even when I remove settings for log4net internal debugging. So it seems that setting log4net internal debugging on fixed the problem. But this is not proper long term solution.
Any ideas what's happening here?
Good morning everybody,
I have a log4net issue that didn't exist when I was developing on my
local machine, but once I deployed the application to a server, log4net stopped working.
This is the server configuration :
-Windows XP SP3
-IIS 7
-framework .Net v4
This is the log4net configuration in the web.config of the website:
<configuration>
<log4net>
<root>
<level value="DEBUG" />
<appender-ref ref="LogFileAppender" />
</root>
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="log.txt" />
<param name="AppendToFile" value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="30MB" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%-5p%d{yyyy-MM-dd hh:mm:ss} – %m%n" />
</layout>
</appender>
</log4net>
</configuration>
I also have a class library and this is its App.config file:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net"/>
</configSections>
<log4net>
<root>
<level value="DEBUG" />
<appender-ref ref="LogFileAppender" />
</root>
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender" >
<param name="File" value="log.txt" />
<param name="AppendToFile" value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="30MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%-5p%d{yyyy-MM-dd hh:mm:ss} – %m%n" />
</layout>
</appender>
</log4net>
</configuration>
This is how I call the log function on every class:
private static readonly ILog log = LogManager.GetLogger(typeof(AppDomain));
...and this is how i call it :
log.Error("\n\t=>" + ex.GetBaseException().Message + "\n\r" + " # " + Environment.StackTrace);
It could be that you do not have permissions to write to the file 'log.txt'.
I don't know what the current directory would be but it's unlikely to be somewhere IIS can write to.
You need to create a folder somewhere and grant access for IIS to write to it, I understand you need to grant access to the IIS_IUSRS group and then specify the absolute path to that file. e.g.
<param name="File" value="D:\Logs\log.txt" />
..using the path to your preferred location.
When it comes to writing log files I tend not to try and write my log files anywhere in the program files directory or anything in any virtual directory just because of the previous battles I've had with security issues. Currently I'm using something like the following for all my log4net log files:
<file type="log4net.Util.PatternString" value="${ALLUSERSPROFILE}/<Product Name>/Logs/<Program Name>/<Program Name>.log" />
${ALLUSERSPROFILE} is the key above. This directory typically doesn't have the security restrictions as virtual directory and the program files directory. I've found that I haven't had any trouble since I've been using this path.
This envrionment variable takes you to the ProgramData directory in Windows Vista, 7, 8, Server 2008 etc. I think XP takes you to a different place but still a directory with relaxed permissions.
On a side note your log statement above:
log.Error("\n\t=>" + ex.GetBaseException().Message + "\n\r" + " # " + Environment.StackTrace);
Can be shortened to: log.Error(ex); Unless the formatting is a must. But if you write it like that and deploy your binaries with the pdbs the exceptions you log will contain the full stack trace and the line number the error occurred on.
Edit:
Log files will also fail to create if you have invalid log4net configuration. If you are sure that you have write access to the folder specified in your log4net configuration I would suggest enabling log4net debugging by first setting debug="true" in your log4net config section:
<log4net debug="true">
...
</log4net>
Setting the above debug flag will tell log4net to output all it's logging via windows trace listeners. To capture this trace listener output you will have to add a section like the following to your app.config:
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add
name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="C:\tmp\log4net.txt" />
</listeners>
</trace>
</system.diagnostics>
Make sure the path specified in the above trace listener config in app.config exists and that you have write access to the folder!
I had the same problem myself and it turned out that I had forgot to set the "Build Action" for the configuration file. Therefore the log4net.config file was not deployed, and this is of course needed to make the application write the log file.
The log folder directory should be given the permission under which IIS is running. e.g. if IIS is run as network service then add Network service account the directory and give full permission to it.
Check with reference to following configuration in web.config. If everything good , check the write permission of inetpub sub-folder using the application pool owner. If not grant full permission.
Hope it will resolve your issue
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net debug="true">
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs\log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%-5p %d %5rms %-22.22c{1} %-18.18M - %m%n %newline--%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingLogFileAppender" />
</root>
</log4net>
I'm using a RollingFileAppender to log some info to a file with a conversionPattern (in the web.config) that looks like this for the header of each log section:
<conversionPattern value="%date - %property{userId} - %property{method}%newline--------------------------------%newline%message%newline%newline"/>
I'd like to log details under this header as bullet points. I'm currently trying to use another RollingFileAppender that logs to the same file with a simple conversionPattern of just a dash, like this:
<conversionPattern value="- %message%newline"/>
But these messages aren't making it into the log file. I'm using Log.Info() for the header and Log.Debug() for the bullet points and filtering each appender on their respective log levels. Is what I'm trying to do possible? Or is there a better way to get header and detail information into a log file from log4net?
Yes you can have two log4net appenders that append (write) to the same log file.
You need to place the following line in each of your Appenders:
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
This will make log4net use a minimal locking model that allows multiple processes to write to the same file.
Here's an example XML that uses two appenders writing to the same log file:
<log4net debug="false">
<appender name="RollingLogFileAppender1" type="log4net.Appender.RollingFileAppender">
<!-- this configures a log for the application messages -->
<file value="TestLog.log" />
<appendToFile value="true" />
<!-- next line uses a minimal locking model that allows multiple processes to write to the same file -->
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10MB" />
<staticLogFileName value="true" />
<!-- make the most recent log the highest numbered log -->
<countDirection value="1" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%-5level %date{MM-dd-yyyy HH:mm:ss.ff} [%property{NDC}] %message%newline [Thread: %thread] %c{1} Method:%method(%file{1}, Line:%line) %newline" />
</layout>
<!-- The following two filters insure only log requests of
version '1' use this Appender -->
</appender>
<appender name="RollingLogFileAppender2" type="log4net.Appender.RollingFileAppender">
<file value="TestLog.log" />
<appendToFile value="true" />
<!-- next line uses a minimal locking model that allows multiple processes to write to the same file -->
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10MB" />
<staticLogFileName value="true" />
<!-- make the most recent log the highest numbered log -->
<countDirection value="1" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%-5level %date{MM-dd-yyyy HH:mm:ss.ff} [%property{NDC}] [Thread: %thread] %c{1} Method:%method(%file{1}, Line:%line) %newline%message" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingLogFileAppender1" />
<appender-ref ref="RollingLogFileAppender2" />
</root>
This can be found in the Apache documentation here:
Apache Log4Net Docs
Just search on this page for 'same file'.
Hope this helps.
You could realize if there is any problem with log4net checking the output window on visual studio. The library log errors there, very useful to detect configuration mistakes.
Odd one this.
I am using NHibernate with one website. I have configured log4net to show me all SQL and and errors in the trace. It all works swimmingly.
I start using NHibernate in the other website - same solution, built on top of same class libraries. I copy the configuration data in web.config from one website to the other:
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
<log4net>
<appender name="AspNetTraceAppender" type="log4net.Appender.AspNetTraceAppender" >
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<logger name="NHibernate.SQL" additivity="false">
<level value="DEBUG" />
<appender-ref ref="AspNetTraceAppender" />
</logger>
<root>
<level value="ERROR"/>
<appender-ref ref="AspNetTraceAppender"/>
</root>
</log4net>
Obviously the new website also has a reference to log4net.dll.
But in the new website, I get no NHibernate output in the trace!
To the best of my knowledge, with log4net you just reference the dll, set up the config and off you go.
Can anyone think what I might be missing?
Thanks
David
Looks like you're forgetting to initialize it.
Take a look at the comment section of this post:
Logging NHibernate SQL with log4net in ASP.NET