log4net: what am I doing wrong? - log4net

Being a log4net newb / boob I just copied lines from an NHibernate example project where I can see the log.txt file is updated. Is there a quick answer why mine isn't creating the file?
Cheers,
Berryl
[assembly: log4net.Config.XmlConfigurator(Watch = true)]
I saw another post here saying this should go in AssemblyInfo, but in the example project this is just another line in a static helper class. Not wanting to 'mess with' assemblyInfo I also put this in a static helper, along with the following to actually log in the same static helper class:
private static readonly log4net.ILog _log = log4net.LogManager.GetLogger( System.Reflection.MethodBase.GetCurrentMethod().DeclaringType );
And in app.config, I have
<configSections>
<section
name="log4net"
type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"
/>
</configSections>
<!-- This section contains the log4net configuration settings -->
<log4net>
<!-- Define an output appender (where the logs can go) -->
<appender name="LogFileAppender" type="log4net.Appender.FileAppender, log4net">
<param name="File" value="log.txt" />
<param name="AppendToFile" value="false" />
<layout type="log4net.Layout.PatternLayout, log4net">
<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] <%X{auth}> - %m%n" />
</layout>
</appender>
<appender name="LogDebugAppender" type="log4net.Appender.DebugAppender, log4net">
<layout type="log4net.Layout.PatternLayout, log4net">
<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] <%X{auth}> - %m%n"/>
</layout>
</appender>
<!-- Setup the root category, set the default priority level and add the appender(s) (where the logs will go) -->
<root>
<priority value="ALL" />
<appender-ref ref="LogFileAppender" />
<appender-ref ref="LogDebugAppender"/>
</root>
<!-- Specify the level for some specific namespaces -->
<!-- Level can be : ALL, DEBUG, INFO, WARN, ERROR, FATAL, OFF -->
<logger name="NHibernate">
<level value="ALL" />
</logger>
</log4net>

You are doing the right thing.
Turn on this setting:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
</configuration>
And paste the resulting output here.

Related

Diverting spring logs to specific log file using log4j

I have the following log4j configuration which works in that it produces two log files, one with the diverted SPRING logs and one where I am attempting to filter out the SPRING content so it is just log messages I have configured using the Logger:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>
<appender name="DEBUG" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="C:/debug/debug.log" />
<param name="Append" value="true" />
<param name="MaxFileSize" value="10MB" />
<param name="MaxBackupIndex" value="10" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p [%t] %C.%M() - %m%n" />
</layout>
</appender>
<appender name="SPRING" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="C:/spring/spring.log" />
<param name="Append" value="true" />
<param name="MaxFileSize" value="10MB" />
<param name="MaxBackupIndex" value="10" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p [%t] %C.%M() - %m%n" />
</layout>
</appender>
<logger name="org.springframework" additivity="false">
<level value="debug"/>
<appender-ref ref="SPRING"/>
</logger>
<logger name="org.hibernate" additivity="false">
<level value="debug"/>
<appender-ref ref="SPRING"/>
</logger>
<root>
<priority value="debug" />
<appender-ref ref="DEBUG"/>
<appender-ref ref="SPRING"/>
</root>
</log4j:configuration>
The problem I am having is that there are still some org.springframework.jdbc calls coming through to my debug log that I am expecting to get diverted to the SPRING log file.
2020-06-26 10:05:29,601 DEBUG [scheduling-1] org.springframework.jdbc.object.SqlCall.compileInternal() - Compiled stored procedure. Call string is [{call SQL(?, ?, ?, ?, ?, ?, ?)}]
2020-06-26 10:05:29,601 DEBUG [scheduling-1] org.springframework.jdbc.object.RdbmsOperation.compile() - RdbmsOperation with SQL [SQL] compiled
I tried adding another logger with no success:
<logger name="org.springframework.jdbc" additivity="false">
<level value="debug"/>
<appender-ref ref="SPRING"/>
</logger>
Any ideas why it isn't getting picked up by these loggers?
If you are using log4j2 you can use below format. Please have a look at log4j and log4j2 spring-examples and Spring-docs for references.
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Properties>
<!-- process ID -->
<Property name="PID">????</Property>
<!-- Log exception conversion -->
<Property name="LOG_EXCEPTION_CONVERSION_WORD">%xwEx</Property>
<!-- log level pattern -->
<Property name="LOG_LEVEL_PATTERN">%5p</Property>
<!-- log date format -->
<Property name="LOG_DATEFORMAT_PATTERN">yyyy-MM-dd HH:mm:ss.SSS</Property>
<!-- Final console log pattern -->
<Property name="CONSOLE_LOG_PATTERN">%clr{%d{${LOG_DATEFORMAT_PATTERN}}}{faint} %clr{${LOG_LEVEL_PATTERN}} %clr{${sys:PID}}{magenta} %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
<!-- Final file log pattern -->
<Property name="FILE_LOG_PATTERN">%d{${LOG_DATEFORMAT_PATTERN}} ${LOG_LEVEL_PATTERN} ${sys:PID} --- [%t] %-40.40c{1.} : %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
</Properties>
<Appenders>
<!-- Console Appender -->
<Console name="Console" target="SYSTEM_OUT" follow="true">
<PatternLayout pattern="${sys:CONSOLE_LOG_PATTERN}" />
</Console>
<!-- File Appender -->
<RollingFile name="File" fileName="${sys:LOG_FILE}" filePattern="${sys:LOG_PATH}/$${date:yyyy-MM}/app-%d{yyyy-MM-dd-HH}-%i.log.gz">
<PatternLayout>
<Pattern>${sys:FILE_LOG_PATTERN}</Pattern>
</PatternLayout>
<Policies>
<SizeBasedTriggeringPolicy size="10 MB" />
</Policies>
</RollingFile>
</Appenders>
<!-- Different loggers -->
<Loggers>
<Logger name="org.hibernate.validator.internal.util.Version" level="warn" />
<logger name="org.springframework.web" level="warn"/> <!-- pre-defined -->
<logger name="org.springframework.boot.actuate.endpoint.web" level="warn"/>
<logger name="org.springframework.jdbc.core" level="warn"/> <!-- pre-defined -->
<!-- Root configuration (Console/File) -->
<Root level="info">
<AppenderRef ref="Console" />
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>
If it's still not working, Please check required logs are enabled or not. (to make sure they are not disabled from any configuration)
Note: If you are using spring-boot, Spring boot’s default logging uses Logback which is included as transitive dependency.

log4net - Log using multiple appenders

I want to log messages to TextBox and also to file. I found an example (http://www.codeproject.com/Articles/43027/Logging-display-and-WPF) that logs to TextBox. I modified the app.config and extend it with another appender.
The config file Looks like this:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<appSettings>
<add key="log4net.Internal.Debug" value="false"/>
</appSettings>
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="C:\log4net_internal.log"/>
</listeners>
</trace>
</system.diagnostics>
<log4net>
<appender name="NotifyAppender" type="log4netSample.Logging.NotifyAppender" >
<layout type="log4net.Layout.PatternLayout">
<param name="Header" value="[Header]\r\n" />
<param name="Footer" value="[Footer]\r\n" />
<param name="ConversionPattern" value="%d [%t] %-5p %c %m%n" />
</layout>
</appender>
<appender name="LogFileAppender" type="log4net.Appender.FileAppender">
<param name="File" value="c:\PrestAba.log" />
<param name="AppendToFile" value="true" />
<layout type="log4net.Layout.PatternLayout">
<param name="Header" value="[Header]\r\n" />
<param name="Footer" value="[Footer]\r\n" />
<param name="ConversionPattern" value="%d [%t] %-5p %c %m%n" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="NotifyAppender" />
<appender-ref ref="LogFileAppender" />
</root>
</log4net>
</configuration>
When i run the application and write the log Messages, it only logs TextBox. Is there more modification needed?
I believe your file name must be escaped to be read:
<param name="File" value="c:\\PrestAba.log" />
Also, you can condense that to
<file value="c:\\PrestAba.log" />
Which is a bit more readable and more in line with log4net's intentions of making readable and maintainable XML.

Using RollingFileAppender ,DailyRollingFileAppender,ConsoleAppender in log4j. Not working

My requirement is to log the messages to 3 separate log files.
I am using 3 appenders in a JBOSS server.
Three of them need to work in the way such as
1.RollingFileAppender, consoleAppender work for 'INFO' and 'ERROR' modes.
2.DailyRollingFileAppender for 'ERROR' mode and for a specific category only.
I have tried lots of combinations like changing the priority value and the categories, but I have so far found no way in which all the three work simulatneously. Either fileAppender and ConsoleAppender work(logging both ERRROR and INFO) and the DailyRollingFileAppender does not or DailyRollingFileAppender does but the other two log only ERRORS not INFO.
Please tell me a way so that the three of them work.
Below mentioned is the log4j.xml I am using.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<!-- ===================================================================== -->
<!-- -->
<!-- Log4j Configuration -->
<!-- -->
<!-- ===================================================================== -->
<!-- -->
<!--
| For more configuration infromation and examples see the Jakarta Log4j
| owebsite: http://jakarta.apache.org/log4j
-->
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">
<!-- file appender -->
<appender name="fileAppender" class="org.apache.log4j.RollingFileAppender">
<param name="file" value="C:/logs/mdmWSServer.log" />
<param name="MaxBackupIndex" value="5" />
<param name="MaxFileSize" value="5MB" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%d{ISO8601}] [%t] [%-5p][ %c:] %m%n"/>
</layout>
</appender>
<appender name="dailyFileAppender" class="org.apache.log4j.DailyRollingFileAppender">
<param name="file" value="C:/logs/dailyApp.log"/>
<param name="MaxBackupIndex" value="5" />
<param name="MaxFileSize" value="5MB" />
<param name="DatePattern" value="'.'yyyy-MM-dd-HH" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%d{ISO8601}] [%t] [%-5p][%c:] %m%n"/>
</layout>
</appender>
<appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%d{ISO8601}] [%t] %m%n"/>
</layout>
</appender>
<category name="com">
<priority value="INFO"/>
<appender-ref ref="fileAppender"/>
<appender-ref ref="consoleAppender"/>
</category>
<category name="com.gsk">
<priority value="ERROR"/>
<appender-ref ref="dailyFileAppender"/>
</category>
<category name="org.apache">
<priority value="INFO"/>
<appender-ref ref="fileAppender"/>
</category>
<root>
<priority value="DEBUG"/>
<appender-ref ref="fileAppender"/>
<appender-ref ref="consoleAppender"/>
</root>
</log4j:configuration>
You can restrict an appender to only log a certain level by using filter class specifying which level you would want to log . See the sample code below
<appender name="TRACE" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%t] %-5p %c - %m%n" />
</layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="levelMin" value="DEBUG" />
<param name="levelMax" value="DEBUG" />
</filter>
</appender>

Log4net appender threshold not working

I've set up a logfileAppender and a consoleAppender in my log4net config for my application. I would like the logfile appender to only write ERROR messages and above and the console appender to write DEBUG and above.
My config is:
<log4net debug="false">
<appender name="LogFileAppender" type="log4net.Appender.FileAppender,log4net" >
<param name="File" value="log.txt" />
<param name="AppendToFile" value="true" />
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%d %M - %m%n" />
</layout>
<threshold value="ERROR"/>
</appender>
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender" >
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d %m%n" />
</layout>
</appender>
<root>
<priority value="DEBUG" />
<appender-ref ref="ConsoleAppender" />
<appender-ref ref="LogFileAppender" />
</root>
</log4net>
I'm finding that both ERROR and DEBUG is being output to my logfile appender. How to restrict it to only ERROR?
Note also that the level tag in the logger doesn't work the same way as threshold or a LevelMatchFilter.
Level indicates what log statements that actually will be generated. This is what you can test on in you code.
Threshold on the other hand, filters away all log messages that falls below your threshold.
This means that having a threshold that is higher than the highest logger level makes no sense. I have seen many times how one sets a level of INFO (because that is what most appenders will use), and then create an appender that has a threshold of DEBUG. And then you are surprised when no DEBUG messages actually appears on the appender...
To get very specific filtering for an appender, you need to configure a LevelMatchFilter or a LevelRangeFilter for the logfile appender to filter the events which are actually output.
For example:
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="ERROR"/>
<levelMax value="FATAL"/>
</filter>
or
<filter type="log4net.Filter.LevelMatchFilter">
<levelToMatch value="ERROR"/>
</filter>
put one of these inside your <appender> tag, and this should work for you:
<appender name="LogFileAppender" type="log4net.Appender.FileAppender,log4net" >
<filter type="log4net.Filter.LevelMatchFilter">
<levelToMatch value="ERROR"/>
</filter>
<param name="File" value="log.txt" />
<param name="AppendToFile" value="true" />
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%d %M - %m%n" />
</layout>
<threshold value="ERROR"/>
</appender>
Note: Updated to remove mistake pointed out by kgiannakakis.
I've created a sample console application using your log4net config and I'm getting the exact behaviour you appear to be wanting....
using System;
using System.IO;
using log4net;
using log4net.Config;
namespace SO_1171258
{
class Program
{
private static readonly ILog log = LogManager.GetLogger(typeof(Program));
static void Main()
{
XmlConfigurator.ConfigureAndWatch(new FileInfo(AppDomain.CurrentDomain.GetData("APP_CONFIG_FILE").ToString()));
log.Error(new Exception("error log statment"));
log.Debug("debug log statment");
}
}
}
When I run this application, the only thing in the logfile is:
2014-01-27 15:02:51,387 Main - System.Exception: error log statment
And to the screen I see:
2014-01-27 15:05:52,190 System.Exception: error log statment
2014-01-27 15:05:52,218 debug log statment
Here is the entirety of my app.config file:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/>
</configSections>
<log4net debug="false">
<appender name="LogFileAppender" type="log4net.Appender.FileAppender,log4net" >
<param name="File" value="log.txt" />
<param name="AppendToFile" value="true" />
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%d %M - %m%n" />
</layout>
<threshold value="ERROR"/>
</appender>
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender" >
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d %m%n" />
</layout>
</appender>
<root>
<priority value="DEBUG" />
<appender-ref ref="ConsoleAppender" />
<appender-ref ref="LogFileAppender" />
</root>
</log4net>
</configuration>
The answers you are receiving are partly correct. The Threshold is only used to set a lower limit on the level appended. A threshold of ERROR will actually receive ERROR and FATAL (which is "above" ERROR).
You do want to implement a LevelMatchFilter with a level value of "ERROR" (and "DEBUG" for the other appender). However, you must also add a DenyAllFilter to the end of your filter chain.
For example:
<appender name="LogFileAppender" type="log4net.Appender.FileAppender,log4net" >
<param name="File" value="log.txt" />
<param name="AppendToFile" value="true" />
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%d %M - %m%n" />
</layout>
<filter type="log4net.Filter.LevelMatchFilter">
<levelToMatch value="ERROR" />
</filter>
<filter type="log4net.Filter.DenyAllFilter" />
</appender>
I've had to implement the DenyAllFilter since log4net 1.2.10 (you can see the question I had on this topic here).
You need to use additivity property. See here for an example. You need to define two loggers.

How do I configure log4j using log4j.xml to append to different log files based on class name?

I want to set up log4j so that all log meessages produced from classes under package com.foo.bar go to bar.log, and all the log meessages produced from classes under package com.bar.blatz go to blatz.log.
Questions
How do I do this using log4j.xml?
I know its possible using property files, but how do I do it using the XML configuration?
This is based on my answer to a similar question:
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<!-- general application log -->
<appender name="BarLogFile" class="org.apache.log4j.FileAppender">
<param name="File" value="bar.log" />
<param name="Threshold" value="INFO" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p %t [%-40.40c] %x - %m%n"/>
</layout>
</appender>
<!-- additional fooSystem logging -->
<appender name="BlatzLogFile" class="org.apache.log4j.FileAppender">
<param name="File" value="blatz.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p %t [%-40.40c] %x - %m%n"/>
</layout>
</appender>
<logger name="com.foo.bar">
<appender-ref ref="BarLogFile"/>
</logger>
<logger name="com.bar.blatz">
<appender-ref ref="BlatzLogFile"/>
</logger>
<root>
<level value="INFO"/>
<!-- no appender, output will be swallowed (I think) -->
</root>
</log4j:configuration>
If you add an appender-ref to the root element, it will also receive com.foo.bar etc messages. You can stop that by specifying 'additivity="false"' on the loggers.
<root>
<level value="INFO"/>
<!-- no appender, output will be swallowed (I think) -->
</root>
We can add appenders here. It will work if the application is using root logger. for example quartz Scheduler API.

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