Log4j2 configuration - No log4j2 configuration file found

Question

Lately I decided to learn how to use the log4j2 logger  I downloaded required jar files  created library  xml comfiguration file and tried to use it  Unfortunately i get this statement in console  Eclipse      ERROR StatusLogger No log4j2 configuration file found  Using default configuration        logging only errors to the console    This is my testing class code   package log4j test   import org apache logging log4j LogManager  import org apache logging log4j Logger   public class Log4jTest       static final Logger logger   LogManager getLogger Logger class getName          public static void main String   args                logger trace  trace            logger debug  debug            logger info  info            logger warn  warn            logger error  error            logger fatal  fatal              And my xml config file    lt  xml version  1 0  encoding  UTF-8   gt   lt Configuration package  log4j test                  status  WARN  gt       lt Appenders gt           lt Console name  Console  target  SYSTEM OUT  gt               lt PatternLayout pattern   d HH mm ss SSS    t   -5level  logger 36  -  msg n   gt           lt  Console gt       lt  Appenders gt       lt Loggers gt           lt Logger name  log4j test Log4jTest  level  trace  gt               lt AppenderRef ref  Console   gt           lt  Logger gt           lt Root level  trace  gt               lt AppenderRef ref  Console   gt           lt  Root gt       lt  Loggers gt   lt  Configuration gt    I tried also with xml without  lt Logger gt  tags  and package specification and in various folders packages directories  but it didn t help  Now my log4j2 xml file is located directly in project folder in eclipse

User · Answer

Eclipse will never see a file until you force a refresh of the IDE  Its a feature  So you can put the file all over the project and Eclipse will ignore it completely and throw these errors  Hit refresh in Eclipse project view and then it works

User · Answer

In my case I had to put it in the bin folder of my project even the fact that my classpath is set to the src folder  I have no idea why  but it s worth a try

User · Answer

Additionally to what Tomasz W wrote  by starting your application you could use settings   -Dorg apache logging log4j simplelog StatusLogger level TRACE    to get most of configuration problems   For details see Log4j2 FAQ  How do I debug my configuration

User · Answer

You need to choose one of the following solutions    Put the log4j2 xml file in resource directory in your project so the log4j will locate files under class path  Use system property -Dlog4j configurationFile file  path to file log4j2 xml

User · Answer

Was following the documentations - Apache Log4j2 Configuratoin and Apache Log4j2 Maven in configuring log4j2 with yaml  As per the documentation  the following maven dependencies are required      lt dependency gt       lt groupId gt org apache logging log4j lt  groupId gt       lt artifactId gt log4j-api lt  artifactId gt       lt version gt 2 8 1 lt  version gt     lt  dependency gt     lt dependency gt       lt groupId gt org apache logging log4j lt  groupId gt       lt artifactId gt log4j-core lt  artifactId gt       lt version gt 2 8 1 lt  version gt     lt  dependency gt    and   lt dependency gt       lt groupId gt com fasterxml jackson dataformat lt  groupId gt       lt artifactId gt jackson-dataformat-yaml lt  artifactId gt       lt version gt 2 8 6 lt  version gt   lt  dependency gt    Just adding these didn t pick the configuration and always gave error  The way of debugging configuration by adding -Dorg apache logging log4j simplelog StatusLogger level TRACE helped in seeing the logs  Later had to download the source using Maven and debugging helped in understanding the depended classes of log4j2  They are listed in org apache logging log4j core config yaml YamlConfigurationFactory   com fasterxml jackson databind ObjectMapper com fasterxml jackson databind JsonNode com fasterxml jackson core JsonParser com fasterxml jackson dataformat yaml YAMLFactory   Adding dependency mapping for jackson-dataformat-yaml will not have the first two classes  Hence  add the jackson-databind dependency to get yaml configuration working    lt dependency gt       lt groupId gt com fasterxml jackson core lt  groupId gt       lt artifactId gt jackson-databind lt  artifactId gt       lt version gt 2 8 6 lt  version gt   lt  dependency gt    You may add the version by referring to the Test Dependencies section of log4j-api version item from MVN Repository  E g  for 2 8 1 version of log4j-api  refer this link and locate the jackson-databind version   Moreover  you can use the below Java code to check if the classes are available in the classpath   System out println ClassLoader getSystemResource  log4j2 yml       Check if file is available in CP ClassLoader cl   Thread currentThread   getContextClassLoader      Code as in log4j2 API  Version  2 8 1  String    classes     com fasterxml jackson databind ObjectMapper     com fasterxml jackson databind JsonNode     com fasterxml jackson core JsonParser     com fasterxml jackson dataformat yaml YAMLFactory      for String className   classes         cl loadClass className

User · Answer

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

[java] Log4j2 configuration - No log4j2 configuration file found

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