here's my latest log file names:
2023.01.16.log2023.01.16.log
2023.01.17.log
2023.01.17.log2023.01.17.log
Is this normal, is it badly configured ?
This is my appender cfg:
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<datePattern value="yyyy.MM.dd'.log'" />
<appendToFile value="true"/>
<rollingStyle value="Date"/>
<maxSizeRollBackups value="10"/>
<staticLogFileName value="false"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/>
</layout>
</appender>
Related
I'm trying to get log4net to log to files in a specific folder structure.
[logfolder]/year/month/day_file.log
With the configuration I have now, the initial log file is perfect. It creates the year and month folder and starts with the correct file.
The problem is that it does not create new files in my desired structure each next day, but it creates a new file by appending the new date to the first log file name. As you can see, it now also does not create the desired month folders.
What I get now is this:
└───2018
└───03
28-03-2018_myLogFile.log
28-03-2018_myLogFile.log28-03-2018
28-03-2018_myLogFile.log29-03-2018
28-03-2018_myLogFile.log30-03-2018
28-03-2018_myLogFile.log31-03-2018
28-03-2018_myLogFile.log01-04-2018
28-03-2018_myLogFile.log02-04-2018
But what I need it this:
└───2018
├───03
│ 28-03-2018_myLogFile.log
│ 29-03-2018_myLogFile.log
│ 30-03-2018_myLogFile.log
│ 31-03-2018_myLogFile.log
│
└───04
01-04-2018_myLogFile.log
02-04-2018_myLogFile.log
03-04-2018_myLogFile.log
The configuration I have now is this:
<log4net>
<root>
<level value="ALL" />
<appender-ref ref="LogFileAppender" />
</root>
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender, log4net">
<file type="log4net.Util.PatternString" value="App_Data/log/%date{yyyy}/%date{MM}/%date{dd-MM-yyyy}_myLogFile.log" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="dd-MM-yyyy" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger %M - %message%newline" />
</layout>
</appender>
What did I do wrong? Or should I solve this by writing my own appender?
Try this.
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender, log4net">
<file type="log4net.Util.PatternString" value="App_Data/log/%date{yyyy}/%date{MM}/" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<staticLogFileName value="false" />
<datePattern value="dd-MM-yyyy'_myLogFile.log'" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger %M - %message%newline" />
</layout>
</appender>
I have changed the file type and datePattern values and added a line to set staticLogFileName false.
I solved it, but I have to give credit to #sgmoore, though the answer was not complete.
The following solution creates a file in a ../log/yyyy/MM/dd-MM-yyyy_myLogFile.log structure. This version works better than the proposed version by #sgmoore.
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender, log4net">
<file type="log4net.Util.PatternString" value="App_Data/log/" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<staticLogFileName value="false" />
<datePattern value="yyyy/MM/dd-MM-yyyy'_myLogFile.log'" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger %M - %message%newline" />
</layout>
</appender>
Here is my appender:
<appender name="ApplicationRollingFile" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="logs/application.log" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<preserveLogFileNameExtension value="true"/>
<datePattern value=".yyyy-MM-dd-hhmmss" />
<maxSizeRollBackups value="50" />
<maximumFileSize value="500KB" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger %C.%M --- %message --- %newlineTrace:%newline %stacktrace%newline" />
</layout>
</appender>
What it currently outputs is:
application.time-logging-started.1.log
application.time-logging-started.2.log
application.time-logging-started.3.log
what I want is:
application.time-of-first-rollover.log
application.time-of-second-rollover.log
application.time-of-third-rollover.log
can this be done? if so, how?
It seems your file element is using a PatternString for the file name, the rolling file appender does already use a conversion for name. There is no need to override the default working.
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
<file value="logs\" />
<datePattern value="yyyy-MM-dd-hhmmss'.log'" />
<staticLogFileName value="false" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<maxSizeRollBackups value="50" />
<maximumFileSize value="500KB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
I want my logfile to end up like this :
2015-04-23.log (YYMMDD.log)
<root>
<level value="DEBUG" />
<appender-ref ref="RollingFileAppender" />
</root>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="logs\CTI\ServiceName" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="20MB" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline%exception" />
</layout>
</appender>
After running the code, the log file comes up as ServiceName_2015-04-23.log.2015-04-23.
What is the issue?
The appender should look like this:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs\CTI\ServiceName\" />
<datePattern value="yyyy-MM-dd'.log'" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="20MB" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline%exception" />
</layout>
</appender>
The key is the datePattern where we add '.log' to the pattern.
Two years later... Better late than never.
You use rollingStyle=date, so log4net adds date in the end of file name.
You can find useful config examples for RollingFileAppender class here.
Does anybody encounter the error from log4net that many null are written with RollingFileAppender unexpectedly when the system gets hang?
The file log will be like below:
2014-06-05 11:40:45,993 [5156] INFO myapp.test.Main getStatus
2014-06-05 11:40:45,995 [5156] INFO myapp.test.Main getStatus
[NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL][NUL]2014-06-05 11:51:58,418 [2992] INFO myapp.test.Main Start...
log4net Version: 1.2.10
Below is log4net.config
<?xml version="1.0" encoding="utf-8" ?>
<log4net>
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender" >
<file value="C:\Test\Log\log4net-log.txt" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger %message%newline" />
</layout>
</appender>
<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender" >
<applicationName value="Test" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingLogFileAppender" />
</root>
</log4net>
All I want to do is append the current date and time to my log file, say:
"export_(Wed_Feb_21_2009_at_1_36_41PM)"
Here is my current config from my app.config
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="c:\export.txt" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message %stackTrace%newline" />
</layout>
</appender>
Is appending the date to my log file possible, or is it one of those things I need to do in code and not config?
To produce file name like:
log_2013-12-19.txt
make changes
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="log_"/>
<param name="RollingStyle" value="Date"/>
<param name="DatePattern" value="yyyy-MM-dd.\tx\t" />
<param name="StaticLogFileName" value="false"/>
</appender>
Please observe param "DatePattern" where .\tx\t makes the file name extension .txt. If you provide .txt instead of .\tx\t, then this would save file name with extension .PxP if the time is PM or .AxA in case of AM. so I used \t to enforce to write character instead of pattern. Time may also be added and what ever time pattern needed.
So, this may be really what Philipp M wanted.
For those who are interested, here is the solution:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="C:\\Users\\chris\\Documents\\log_.txt"/>
<param name="RollingStyle" value="Date"/>
<param name="DatePattern" value="_(yyyy.MM.dd-hh_mm_ss)"/>
<param name="StaticLogFileName" value="false"/>
<maximumFileSize value="100KB" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message %stackTrace%newline" />
</layout>
</appender>
and the unit test which verifies this:
[Test]
public void TestLogger()
{
logger.Info("Start Log");
for (int i = 0; i < 2500; i++)
{
logger.Info(i);
}
logger.Info("End Log Log");
}
It produces the following output:
log_.txt_(2009.02.19-01_16_34)
Not really what I wanted, but better than what I had before.
Add the following to your config file
<appender name="rollingFile" type="log4net.Appender.RollingFileAppender,log4net">
<param name="File" value="c:\\ProjectX\\Log\\log.txt"/>
<param name="AppendToFile" value="true"/>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
<param name="RollingStyle" value="Date"/>
<param name="DatePattern" value="yyyy.MM.dd"/>
<param name="StaticLogFileName" value="true"/>
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%date [%thread] %-5level %logger - %message%newline"/>
</layout>
</appender>
If you want to use a .log suffix (to generate a file like myLogPrefix.20160309.log) use:
<appender name="GeofenceFileAppender" type="log4net.Appender.RollingFileAppender">
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<file type="log4net.Util.PatternString" value="C:\\Logs\\myLogPrefix" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value=".yyyyMMdd.lo'g'" />
<staticLogFileName value ="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger – %message%newline" />
</layout>
</appender>
The gotchas are the staticLogFileName = false which allows you to generate rollups on the fly (instead of having to restart the service\server) and the awkward 'g' in the datepattern since g is a magic character in datePattern. There isn't good documentation on the log4net site to study this, so it's really wisdom gained from trial and error and scouring other people's experiences.
Use StaticLogFileName:
<param name="StaticLogFileName" value="true"/>