According to JBoss documentation when you provide log4j.properties JBoss should respect such settings - https://docs.jboss.org/author/display/AS72/Logging+Configuration#LoggingConfiguration-PerdeploymentLogging

I created a simple application to reproduce the issue. Settings from log4.properties (located in WEB-INF/classes) are ignored. Basically, nothing is logged from the context listener shown below (not even System.err). When I remove log4j.properties I see the logs but settings are taken from standalone.xml - definitely not what I was expecting.

Does anyone know why it does not work? Am I missing something?

Simple app in question:

@WebListener

public class LoggingContextListener implements ServletContextListener {

  @Override

  public void contextInitialized(ServletContextEvent sce) {

    System.err.println("Trying to log something using SLF4J-Log4J");

    org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(getClass());

    logger.error("Hello");

    logger.warn("anybody home?");

    logger.info("can you hear me?");

    logger.debug("WTF?");

    System.err.println("Did you notice any logs?");

  }

  @Override

  public void contextDestroyed(ServletContextEvent sce) {

  }

}

with the following log4j.properties:

log4j.rootLogger=WARN, stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.Target=System.out

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

and pom.xml:

<project>

  <modelVersion>4.0.0</modelVersion>

  <groupId>logging-jboss</groupId>

  <artifactId>logging-jboss</artifactId>

  <version>1.0</version>

  <name>Logging in JBoss 7.2</name>

  <packaging>war</packaging>

  <dependencies>

    <dependency>

      <groupId>org.slf4j</groupId>

      <artifactId>slf4j-log4j12</artifactId>

      <version>1.7.5</version>

      <scope>runtime</scope>

    </dependency>

    <dependency>

      <groupId>javax.servlet</groupId>

      <artifactId>javax.servlet-api</artifactId>

      <version>3.0.1</version>

      <scope>provided</scope>

    </dependency>

  </dependencies>

  <build>

    <plugins>

      <plugin>

        <artifactId>maven-compiler-plugin</artifactId>

        <configuration>

          <source>1.6</source>

          <target>1.6</target>

        </configuration>

      </plugin>

      <plugin>

        <groupId>org.apache.maven.plugins</groupId>

        <artifactId>maven-war-plugin</artifactId>

        <configuration>

          <!-- Support Servlet 3.x and higher -->

          <failOnMissingWebXml>false</failOnMissingWebXml>

        </configuration>

      </plugin>

    </plugins>

  </build>

</project>

BTW. Logs after removing log4j.properties:

09:45:14,578 ERROR [stderr] (ServerService Thread Pool -- 54) Trying to log something using SLF4J-Log4J

09:45:14,582 ERROR [logging.LoggingContextListener] (ServerService Thread Pool -- 54) Hello

09:45:14,582 WARN  [logging.LoggingContextListener] (ServerService Thread Pool -- 54) anybody home?

09:45:14,582 INFO  [logging.LoggingContextListener] (ServerService Thread Pool -- 54) can you hear me?

09:45:14,582 ERROR [stderr] (ServerService Thread Pool -- 54) Did you notice any logs?

09:45:14,756 INFO  [org.jboss.as.server] (ServerService Thread Pool -- 26) JBAS018559: Deployed "logging-jboss-1.0.war" (runtime-name : "logging-jboss-1.0.war")

Message was edited by: Przemyslaw Bielicki