How to change the log4net rolling filenames to log_YYYMMDD_HHmmss.txt - log4net

I am maintaining some c# code and I want to log4net to store old log files as:
log_YYYMMDD_HHmmss.txt
eg:
log_20140617_193526.txt
I believe this is the relevant part of the config file, with my attempts at modifying it...
<appender name="HourlyAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString"
value="${ALLUSERSPROFILE}/Optex/RedwallServer/Log/log.txt" />
<appendToFile value="false" />
<datePattern value="yyyyMMdd_HHmmss.\tx\t" />
<rollingStyle value="Date" />
<layout type="log4net.Layout.PatternLayout">
<param name="Header" value="" />
<param name="Footer" value="" />
<param name="ConversionPattern" value="%d [%t] %-5p %c %m%n" />
</layout>
</appender>
It is producing a current log file of:
log.txt
And old log files are stored like:
log.txt20140617_193526.txt
Anyone any idea how I can change the prefix from "log.txt" to "log_"?
What I would really like is to figure this out myself, but I can't for the life of me find any decent documentation. I found this on rollingConfig but it is not what I'm after...
http://logging.apache.org/log4net/release/sdk/log4net.Appender.RollingFileAppender.html

It seem you have to change log.txt to log_:
<file type="log4net.Util.PatternString"
value="${ALLUSERSPROFILE}/Optex/RedwallServer/Log/log_" />

Related

log4net - specify which file to create. Do not create all appenders

I have a project in my solution that runs several different background jobs using Hangfire. I would like to be able to specify a different log file to be created using Log4Net based on the background job that is running.
For example;
job 1 does validation checks across a database and job 2 synchronizes data from a 3rd party app into another database
I have several appenders specified in the config file but all log files get created when I run job 1 or job 2. I want a log file only to be created per job e.g. when I run Job 1 log file job1.xml gets created and not job2.xml and vice versa
Is there any way of specifying the appender only? In the below example I want the file c:\logging\testing\jobs3-%date{ddMMMyyyy-hhmmss}.xml to be created only not the others
XmlConfigurator.Configure();
log4net.ILog log = log4net.LogManager.GetLogger("xmlFile2");
=====config file========
<appender name="file" type="log4net.Appender.RollingFileAppender">
<file value="c:\logging\job1.log" />
<appendToFile value="true" />
<rollingStyle value="Once" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date - [%M] %level %logger - %message%newline" />
</layout>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
</appender>
<appender name="xmlFile" type="log4net.Appender.FileAppender">
<file type="log4net.Util.PatternString" value="c:\logging\testing\job2-%date{ddMMMyyyy-hhmmss}.xml" />
<appendToFile value="true" />
<layout type="log4net.Layout.XmlLayoutSchemaLog4j">
<locationInfo value="true" />
</layout>
<param name="Encoding" value="utf-8" />
</appender>
<appender name="xmlFile2" type="log4net.Appender.FileAppender">
<file type="log4net.Util.PatternString" value="c:\logging\testing\jobs3-%date{ddMMMyyyy-hhmmss}.xml" />
<appendToFile value="true" />
<layout type="log4net.Layout.XmlLayoutSchemaLog4j">
<locationInfo value="true" />
</layout>
<param name="Encoding" value="utf-8" />
</appender>
</log4net>

Why is the date on the file not rolling?

I must be doing something stupid but I can't think of it (I believe the core of my problem is that the PatternString is not dynamic and it gets set once when the program starts). Here is my lognet.config file:
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="F:\Logs\MonitorService_%date{yyyyMMdd}.log" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<datePattern value="yyyyMMdd" />
<maxSizeRollBackups value="5" />
<maximumFileSize value="3000MB" />
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="DEBUG" />
<levelMax value="FATAL" />
</filter>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d [%t] %-5p %c :: %m%n" />
</layout>
</appender>
It seems like the files are coming out in a screwed up manner as:
F:\Logs\MonitorService_20170212.log
F:\Logs\MonitorService_20170212.log20170613
F:\Logs\MonitorService_20170212.log20170614
I would like them to come out as follows when they roll from day to day:
F:\Logs\MonitorService_20170612.log
F:\Logs\MonitorService_20170613.log
F:\Logs\MonitorService_20170614.log
What am I doing wrong?
There's no need to put the date in the file element's value.
The datePattern element determines the suffix applied to a log file when a new log file is created.
<file type="log4net.Util.PatternString" value="F:\Logs\MonitorService" />
<datePattern value="_yyyyMMdd" />
Here, the current log file will be called 'MonitorService' and when it is rolled on, the file will be renamed 'MonitorService_20170622' and a new file called 'MonitorService' will be created to store new log messages.

why files not delete for maxDateRollBackups settings

I have below log4Net configuration,
<appender name="WhateverYouNameThis" type="log4net.Appender.RollingFileAppender">
<threshold value="All" />
<file value="logs\WhateverYouNameThisFile.log" />
<appendToFile value="true" />
<maxDateRollBackups value="2" />
<maxSizeRollBackups value="2" />
<maximumFileSize value="2KB" />
<rollingStyle value="Composite" />
<staticLogFileName value="true" />
<datePattern value="yyyyMMdd-HH.lo\g" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d [%t] %-5p - %m%n" />
</layout>
</appender>
"maxSizeRollBackups =2" works fine. When file gets larger than 2KB, it will roll to another file, up to 2 times, and then these will start getting deleted too if it goes over 2 files.
but "maxDateRollBackups=2" is not working. Any files older than 2 days is not deleted. Please suggest the reason!
When date change the file rename with 1 day before date, but files older than 2 days is not delete,
This issue seems known in log4net. These issues https://issues.apache.org/jira/browse/LOG4NET-27 / https://issues.apache.org/jira/browse/LOG4NET-367 describes the major problems with the rolling file appender. If you have any new information, I am interested in solutions as well.

Write hebrew with log4net

I write mixed Hebrew and English characters to a file using log4net but instead of Hebrew i see question marks.
I've tried setting Application's and Thread's culture info to 'he-IL' but it doesn't seem to help.
Does log4net support Hebrew characters? If so, how can i make it work?
Thanks
Edit:
This is my config section:
<appender name="ErrorsFileAppender" type="log4net.Appender.RollingFileAppender,log4net">
<param name="File" value="c:\\taskman\\service.log"/>
<param name="AppendToFile" value="true" />
<rollingStyle value="Date"/>
<datePattern value="'service.'yyyy-MM-dd'.log'"/>
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%d;%m%n"/>
</layout>
</appender>
The hebrew text comes from the DB which is an SQL server 2005.
Add the following line to your app.config file, in the appender section:
<encoding value="windows-1255" />
After I tried adding the windows-1255 to the encoding value I still had issue with Hebrew text.
I ended up adding :
<encoding value="utf-8" />
And it worked only in UTF-8 mode
Encountered the same issue here.
I have configured log4net with the following settings:
<log4net>
<root>
<level value="DEBUG" />
<appender-ref ref="LogFileAppender" />
</root>
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender" >
<param name="File" value="giscraweler.txt" />
<encoding value="windows-1255" />
<param name="AppendToFile" value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%date [%thread] %-5level - %message%newline" />
</layout>
</appender>
</log4net>
I saw the font good in the Visual studio debug window, But when i opened the log file with Notepad++ - The text was not right, i saw weird characters.
How to fix ? Set up your "character sets" as first comment suggested.
I selected character sets windows-1255 and now i see the hebrew fonts.

log4net one file per run

I need my application to create a log file each time it runs.
My preferred format would be App.log.yyyy-MM-dd_HH-mm-ss. If that's not possible, I'd settle for App.log.yyyy-MM-dd.counter
This is my current appender configuration:
<appender name="File" type="log4net.Appender.RollingFileAppender">
<file value="App.log"/>
<rollingStyle value="Date"/>
<datePattern value=".yyyy-MM-dd_HH-mm-ss"/>
<staticLogFileName value="false"/>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
</appender>
But it creates a random number of files based on the date and time.
I assume that the application should create only one log file every time it runs, so you do not need a rolling file appender (though my solution would apply for rolling file appenders as well):
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file type="log4net.Util.PatternString" value="c:\temp\App-%date{yyyy-MM-dd_HH-mm-ss}.log" />
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%2thread] %-5level - %message%newline" />
</layout>
</appender>
(Obviously you can use other your own layout and other settings for the file appender.)
Also note that you can set your rolling style as
rollingstyle="Once"
and it will create a new file every time it is run. If staticLogFileName is set to true (e.g., logname.log) the previous logs will be set to logname.log.1, logname.log.2, etc.
The number of files kept before overwriting the oldest (say, 10) can be controlled by setting
maxSizeRollBackups="10"
Edit:
My config, which creates a datestamped log per execution (unless one exists, in which case it follows the .1 rule, looks like this:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="Logs\MyLog-%date{dd-MM-yyyy}.log" />
<appendToFile value="false" />
<maxSizeRollBackups value="-1" /> <!--infinite-->
<staticLogFileName value="true" />
<rollingStyle value="Once" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%-5level %date [%thread] %c{1} - %m%n" />
</layout>
</appender>
Not 100% sure if I need appendToFile="false" as the docs say that's done automatically when you use rollingStyle="Once", but this makes it clearer in any case.
It's documented from apache in the log4net docs at:
https://logging.apache.org/log4net/release/config-examples.html
ctrl+f for "per program execution"
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logfile.txt" />
<appendToFile value="false" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="-1" />
<maximumFileSize value="50GB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>

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