log4j2 – Page 4 – Tarik Billa

No log4j2 configuration file found. Using default configuration: logging only errors to the console

February 15, 2023 by Tarik

Problem 1 ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console. Solution 1 To work with version 2 of log4j aka “log4j2” -Dlog4j.configuration= should read -Dlog4j.configurationFile= 1.2 manual: http://logging.apache.org/log4j/1.2/manual.html 2.x manual: http://logging.apache.org/log4j/2.x/manual/configuration.html Problem 2 log4j:WARN …. Solution 2 In your project, uninclude the log4j-1.2 jar and instead, include … Read more

What does “status” mean in Log4j2 configuration?

January 17, 2023 by Tarik

The status logger is used internally by log4j2 components. Setting status=”debug” (or “trace”) in the configuration will cause this internal logging to be output to the command line. It will print debug information about which log4j2 plugin components are loaded (all configuration elements map to log4j2 plugins), and more details like for example what appenders … Read more

Log4j2 configuration – No log4j2 configuration file found

January 13, 2023 by Tarik

Is this a simple eclipse java project without maven etc? In that case you will need to put the log4j2.xml file under src folder in order to be able to find it on the classpath. If you use maven put it under src/main/resources or src/test/resources

Programmatically change log level in Log4j2

November 30, 2022 by Tarik

The Easy Way : EDITED according to log4j2 version 2.4 FAQ You can set a logger’s level with the class Configurator from Log4j Core. BUT be aware that the Configurator class is not part of the public API. // org.apache.logging.log4j.core.config.Configurator; Configurator.setLevel(“com.example.Foo”, Level.DEBUG); // You can also set the root logger: Configurator.setRootLevel(Level.DEBUG); Source The Preferable Way … Read more

Is it worth to use slf4j with log4j2

October 25, 2022 by Tarik

Go ahead: program to the log4j2 API instead of slf4j It’s safe: the Log4j2 API offers the exact same guarantees as slf4j – and more. Now that Log4j2 itself is separated into an API and an implementation module, there is no longer any value in using SLF4J. Yes, it is good engineering practice to keep … Read more

Very simple log4j2 XML configuration file using Console and File appender

October 3, 2022 by Tarik

<?xml version=”1.0″ encoding=”UTF-8″?> <Configuration status=”INFO”> <Appenders> <Console name=”Console” target=”SYSTEM_OUT”> <PatternLayout pattern=”%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} – %msg%n” /> </Console> <File name=”MyFile” fileName=”all.log” immediateFlush=”false” append=”false”> <PatternLayout pattern=”%d{yyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} – %msg%n”/> </File> </Appenders> <Loggers> <Root level=”debug”> <AppenderRef ref=”Console” /> <AppenderRef ref=”MyFile”/> </Root> </Loggers> </Configuration> Notes: Put the following content in your configuration file. Name the … Read more