switched to log4j 2.1

main/pom.xml

@@ -28,8 +28,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
 		<!-- dependency versions -->
-		<log4j.version>1.2.16</log4j.version>
-		<slf4j.version>1.7.5</slf4j.version>
+		<log4j.version>2.1</log4j.version>
 		<junit.version>4.11</junit.version>
 		<commons-io.version>2.4</commons-io.version>
 		<commons-collections.version>4.0</commons-collections.version>
@@ -63,19 +62,19 @@
 
 			<!-- Logging -->
 			<dependency>
-				<groupId>log4j</groupId>
-				<artifactId>log4j</artifactId>
+				<groupId>org.apache.logging.log4j</groupId>
+				<artifactId>log4j-core</artifactId>
 				<version>${log4j.version}</version>
 			</dependency>
 			<dependency>
-				<groupId>org.slf4j</groupId>
-				<artifactId>slf4j-api</artifactId>
-				<version>${slf4j.version}</version>
+				<groupId>org.apache.logging.log4j</groupId>
+				<artifactId>log4j-slf4j-impl</artifactId>
+				<version>${log4j.version}</version>
 			</dependency>
 			<dependency>
-				<groupId>org.slf4j</groupId>
-				<artifactId>slf4j-log4j12</artifactId>
-				<version>${slf4j.version}</version>
+				<groupId>org.apache.logging.log4j</groupId>
+				<artifactId>log4j-jul</artifactId>
+				<version>${log4j.version}</version>
 			</dependency>
 
 			<!-- commons -->
@@ -119,12 +118,16 @@
 
 	<dependencies>
 		<dependency>
-			<groupId>log4j</groupId>
-			<artifactId>log4j</artifactId>
+			<groupId>org.apache.logging.log4j</groupId>
+			<artifactId>log4j-core</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.logging.log4j</groupId>
+			<artifactId>log4j-slf4j-impl</artifactId>
 		</dependency>
 		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-log4j12</artifactId>
+			<groupId>org.apache.logging.log4j</groupId>
+			<artifactId>log4j-jul</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>