I have the following working config:
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value=".\\App_Data\\log.txt" />
I want to have the log file appear like this
log.2012-11-28.txt
log.2012-11-29.txt
And so on. Notice the .txt at the end.
How do I change the file value in the config to do that?
Add this to appender configuration, please make sure that you don't have other rollingStyle added
<rollingStyle value="Date" />
<datePattern value="'log.'yyyy-MM-dd'.txt'" />
Related
I have log4Net set up with the following config settings in a web service web.config file:
<log4net>
<!-- RollingFile is set to be a File Appender -->
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="c:\temp\Sync.log" />
<appendToFile value="true" />
<maximumFileSize value="50MB" />
<maxSizeRollBackups value="10" />
<datePattern value="yyyyMMdd" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %-5level %-50logger - %message%newline%newline" />
</layout>
</appender>
<!-- Set root logger level to DEBUG to have all log -->
<root>
<level value="INFO" />
<appender-ref ref="RollingFile" />
</root>
The issue I am having is when I look in temp I see 17 files
Sync.Log
Sync.log20180424.log
(other sync files with dates)
...
the last one being
Sync.log20180405
I am confused as to why it is not removing the ones beyond 10 days as stated by the maxSizeRollBackups.
I know that by default the is rollingStyle = composite.
With my current config, how would it behave if I let it go?
And as a second - what am I missing in my current settings.
Thanks. I know there are similar questions out there but in reading them I feel like I am still missing something.
It turns out that what I was trying to do is not possible.
As stated in other places:
A maximum number of backup files when rolling on date/time boundaries is not supported.
Because of this, I took the date portion out so that the backups roll by size only. After doing that I did not have the same issues. I don't like the file name as much but it is still easy enough to track them based on their file properties having the date last edited.
I have a problem with the log output in a single file by using MPI (Message Passing Interface) into my app (write in C#) and log4net. The log output works fine when my app a little time works but when the app start created log4net sometimes not one log file but two or three log files. Here a example:
Properly (App start and log4net build one log file):
Log_2014_02_25_[12.39.07]_Build_2014_02_25
Wrong (App start and log4net build three log files):
Log_2014_02_25_[12.12.03]_Build_2014_02_25
Log_2014_02_25_[12.12.03]_Build_2014_02_252014_02_25
Log_2014_02_25_[12.12.03]_Build_2014_02_252014_02_25252014_02_25
I think log4net tries exactly at the same time to write something in the log file. If that coincidentally happens is the log file locked and log4net cannot in the same log file write. In this case created log4net probably created a new log file. In short, I think the problem is the Minimal Lock from log4net but I'm not sure and not know how I can solve the error.
Here my log4net config:
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="Logs\%property{LogFileName}.log"/>
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyy_MM_dd" />
<staticLogFileName value="false" />
<preserveLogFileNameExtension value="true"/>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date{dd.MM.yyyy HH:mm:ss} - %message%newline" />
</layout>
</appender>
var fileName = string.Format("Log_{0}_[{1}]_Build_",
DateTime.Now.ToString("yyyy_MM_dd"), DateTime.Now.ToString("HH.mm.ss")); //
GlobalContext.Properties["LogFileName"] = fileName;
log4net.Config.XmlConfigurator.Configure();
Thx for all help.... :)
you are using a minimal lock.
try:
<lockingModel type="log4net.Appender.FileAppender+InterProcessLock" />
With the config:
<file value="C:\\MyLog"/>
<datePattern value="yyyyMMdd'.log'" />
I can get the historical log named like "Mylog20120529.log".
I wonder whether i can get the log named like "20120529.log".
THX guys
Apply a trick here and it will do the job.
<file value="C:\\MyLog\20"/>
<datePattern value="yyMMdd'.log'" />
I configured my log4net to watch on changes made to the app.config file.
[assembly: log4net.Config.XmlConfigurator(Watch = true)]
When I run my app and change things in the config file, these changes only take effect when I restart my app. Why could this be?
Is there also a way to tell log4net to watch on changes in the app.config? Like:
<appender name="FileAppender" type="log4net.Appender.FileAppender" >
<watch value="true" />
</appender>
------------- EDIT -------------
I tried now to use a separate config-file: log4net.config.
It looks like this:
<log4net>
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="c:\log.txt" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d [%t] %-5p %c (line %L) -- %m%n" />
</layout>
</appender>
<root>
<appender-ref ref="FileAppender" />
</root>
</log4net>
In my assemblyInfo.cs I wrote the following:
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]
The class that logs to the file looks like this:
ILog myLogger = LogManager.GetLogger(typeof(Form1));
myLogger.Debug("test");
This works like the old version. logfile entries are made, but when I change my log4net.config during runtime, these changes are not applied.... "Watch=true" should enable that feature, right?
HA!, I was just encountering the same problem, running unit tests that require logging.
Adding this line fixed it:
log4net.Config.XmlConfigurator.Configure();
My App.config:
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="100KB" />
<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>
</log4net>
I also do have this:
[assembly: log4net.Config.XmlConfigurator(Watch = true)]
According to log4net documentation, the Watch feature does not work for application configuration files (app.config, web.config):
Because the System.Configuration API does not support reloading of the config file
the configuration settings cannot be watched using the
log4net.Config.XmlConfigurator.ConfigureAndWatch methods.
So if you need the log4net configuration to be re-configurable, you will need to place it in a separate XML file and your application needs to have sufficient permissions to read the file:
The file to read the configuration from can be specified using any of the log4net.Config.XmlConfigurator methods that accept a System.IO.FileInfo object. Because the file system can be monitored for file change notifications the ConfigureAndWatch methods can be used to monitor the configuration file for modifications and automatically reconfigure log4net.
Even though I'm terribly late to the party - here's, what helped me: a simple call to log4net.LogManager.GetLogger("DUMMY"); at the very beginning of my program. I put it in the very first line of program.cs's Main() method. No need to assign the logger to any object, merely a polite request to log4net to read the assembly's attributes as stated here.
Using attributes can be a clearer method for defining where the application's configuration will be loaded from. However it is worth noting that attributes are purely passive. They are information only. Therefore if you use configuration attributes you must invoke log4net to allow it to read the attributes. A simple call to LogManager.GetLogger will cause the attributes on the calling assembly to be read and processed. Therefore it is imperative to make a logging call as early as possible during the application start-up, and certainly before any external assemblies have been loaded and invoked.
I got this:
<appender name="iOsClients_Error" type="log4net.Appender.RollingFileAppender">
<file value="Logs/errors/error_"/>
<appendToFile value="true"/>
<rollingStyle value="Date"/>
<datePattern value="yyyyMMdd" />
<staticLogFileName value="false"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%newline%newline%date [%thread] %-5level - %message%newline%newline%exception%newline%newline"/>
</layout>
</appender>
This will create a log file like: error_20110801
How can I get log4net to output text files or how can I get log4net to add the .txt file extension to these files?
I want this: error_20110801.txt
You can use something like this to accomplish that:
<file type="log4net.Util.PatternString" value="Logs/errors/error_%date{yyyyMMdd}.txt" />
They key here is to use the PatternString
The problem with
<file type="log4net.Util.PatternString" value="Logs/errors/error_%date{yyyyMMdd}.txt" />
is that if the server doesn't restart every day, the file will have the same date, so the same name. And the archived file will be like error_20130101.txt20130101 .
The solution to this is here actually : Setting a log file name to include current date in Log4j