Merge branch 'eugenp:master' into master

logging-modules/log4j/README.md

@@ -3,3 +3,4 @@
 - [Introduction to SLF4J](http://www.baeldung.com/slf4j-with-log4j2-logback)
 - [A Guide to Rolling File Appenders](http://www.baeldung.com/java-logging-rolling-file-appenders)
 - [Logging Exceptions Using SLF4J](https://www.baeldung.com/slf4j-log-exceptions)
+- [Log4j Warning: "No Appenders Could Be Found for Logger"](https://www.baeldung.com/log4j-no-appenders-found)

logging-modules/log4j/src/main/java/com/baeldung/log4j/NoAppenderExample.java

@@ -0,0 +1,18 @@
+package com.baeldung.log4j;
+
+import org.apache.log4j.Logger;
+
+public class NoAppenderExample {
+
+    private final static Logger logger = Logger.getLogger(NoAppenderExample.class);
+
+    public static void main(String[] args) {
+
+        //Setup default appender
+        //BasicConfigurator.configure();
+
+        //Define path to configuration file
+        //PropertyConfigurator.configure("src\\main\\resources\\log4j.properties");
+        logger.info("Info log message");
+    }
+}

logging-modules/log4j/src/main/resources/log4j.properties

@@ -0,0 +1,5 @@
+log4j.rootLogger=INFO, 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{yy/MM/dd HH:mm:ss} %p %c{2}: %m%n

logging-modules/log4j/src/main/resources/log4j.xml

@@ -90,6 +90,8 @@
         <appender-ref ref="roll-by-time-and-size"/>
     </category>
 
+    <logger name="com.baeldung.log4j.NoAppenderExample"/>
+
     <root>
         <level value="DEBUG"/>
         <appender-ref ref="stdout"/>