KNET-18079: Migrate reload4j (log4j1) to log4j2

NOTICE

@@ -24,6 +24,12 @@ The following libraries are included in packaged versions of this project:
  * NOTICE: licenses/NOTICE.log4j.txt
  * HOMEPAGE: http://logging.apache.org/log4j/1.2/
 
+* Apache Log4j
+ * COPYRIGHT: Copyright 1999-2024 Apache Software Foundation
+ * LICENSE: licenses/LICENSE.apache2.txt
+ * NOTICE: licenses/NOTICE.log4j2.txt
+ * HOMEPAGE: https://logging.apache.org/log4j/2.x/
+
 * Apache ZooKeeper
  * COPYRIGHT: Copyright 2009-2014 The Apache Software Foundation
  * LICENSE: licenses/LICENSE.apache2.txt

config/log4j2.yaml

@@ -0,0 +1,32 @@
+Configuration:
+  name: "Log4j2"
+  Properties:
+    Property:
+      # Fallback if the system property is not set
+      - name: "kafka-rest.logs.dir"
+        value: "."
+  Appenders:
+    RollingFile:
+      name: "file"
+      fileName: "${sys:kafka-rest.log.dir}/kafka-rest.log"
+      filePattern: "/kafka-rest.log.%i"
+      PatternLayout:
+        pattern: "[%d] %v1Level %m (%c)%n"
+      Policies:
+        SizeBasedTriggeringPolicy:
+          size: "100MB"
+      DefaultRolloverStrategy:
+        max: "10"
+        # Using the min strategy, the newest log file will have index 1 and the oldest one will have index max.
+        fileIndex: "min"
+    Console:
+      name: "STDOUT"
+      target: "SYSTEM_OUT"
+      PatternLayout:
+        pattern: "[%d] %v1Level %m (%c:%L)%n"
+  Loggers:
+    Root:
+      level: "INFO"
+      AppenderRef:
+        - ref: "file"
+        - ref: "STDOUT"

kafka-rest/pom.xml

@@ -63,8 +63,13 @@
             <version>${io.confluent.schema-registry.version}</version>
         </dependency>
         <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-reload4j</artifactId>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-slf4j-impl</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-yaml</artifactId>
+            <scope>runtime</scope>
         </dependency>
         <dependency>
             <groupId>io.confluent</groupId>
@@ -147,6 +152,12 @@
             <artifactId>kafka-schema-registry</artifactId>
             <version>${io.confluent.schema-registry.version}</version>
             <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-reload4j</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.easymock</groupId>

kafka-rest/src/assembly/package.xml

@@ -47,15 +47,15 @@
             <excludes>
                 <exclude>io.confluent:rest-utils</exclude>
                 <exclude>org.slf4j:slf4j-log4j12</exclude>
-                <exclude>org.slf4j:slf4j-reload4j</exclude>
+                <exclude>org.apache.logging.log4j:log4j-slf4j-impl</exclude>
             </excludes>
         </dependencySet>
         <dependencySet>
             <outputDirectory>share/java/kafka-rest-bin</outputDirectory>
             <useProjectArtifact>false</useProjectArtifact>
             <useTransitiveFiltering>true</useTransitiveFiltering>
             <includes>
-                <include>org.slf4j:slf4j-reload4j</include>
+                <include>org.apache.logging.log4j:log4j-slf4j-impl</include>
             </includes>
         </dependencySet>
     </dependencySets>

kafka-rest/src/test/resources/log4j2.yaml

@@ -0,0 +1,22 @@
+Configuration:
+  name: "Log4j2"
+  Appenders:
+    Console:
+      name: "STDOUT"
+      target: "SYSTEM_OUT"
+      PatternLayout:
+        pattern: "[%d] %v1Level %m (%c:%L)%n"
+  Loggers:
+    Root:
+      level: "TRACE"
+      AppenderRef:
+        ref: "STDOUT"
+    Logger:
+      - name: "kafka"
+        level: "ERROR"
+      - name: "org.apache.kafka"
+        level: "ERROR"
+      - name: "org.eclipse"
+        level: "ERROR"
+      - name: "org.hibernate.validator"
+        level: "ERROR"

licenses/NOTICE.confluent-common.txt

@@ -6,6 +6,12 @@ The following libraries are included in packaged versions of this project:
  * NOTICE: licenses/NOTICE.log4j.txt
  * HOMEPAGE: http://logging.apache.org/log4j/1.2/
 
+* Apache Log4j
+ * COPYRIGHT: Copyright 1999-2024 Apache Software Foundation
+ * LICENSE: licenses/LICENSE.apache2.txt
+ * NOTICE: licenses/NOTICE.log4j2.txt
+ * HOMEPAGE: https://logging.apache.org/log4j/2.x/
+
 * Apache ZooKeeper
  * COPYRIGHT: Copyright 2009-2014 The Apache Software Foundation
  * LICENSE: licenses/LICENSE.apache2.txt

licenses/NOTICE.confluent-schema-registry.txt

@@ -24,6 +24,12 @@ The following libraries are included in packaged versions of this project:
  * NOTICE: licenses/NOTICE.log4j.txt
  * HOMEPAGE: http://logging.apache.org/log4j/1.2/
 
+* Apache Log4j
+ * COPYRIGHT: Copyright 1999-2024 Apache Software Foundation
+ * LICENSE: licenses/LICENSE.apache2.txt
+ * NOTICE: licenses/NOTICE.log4j2.txt
+ * HOMEPAGE: https://logging.apache.org/log4j/2.x/
+
 * Apache ZooKeeper
  * COPYRIGHT: Copyright 2009-2014 The Apache Software Foundation
  * LICENSE: licenses/LICENSE.apache2.txt

licenses/NOTICE.log4j2.txt

@@ -0,0 +1,20 @@
+Apache Log4j
+Copyright 1999-2024 Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).
+
+ResolverUtil.java
+Copyright 2005-2006 Tim Fennell
+
+Dumbster SMTP test server
+Copyright 2004 Jason Paul Kitchen
+
+TypeUtil.java
+Copyright 2002-2012 Ramnivas Laddad, Juergen Hoeller, Chris Beams
+
+picocli (http://picocli.info)
+Copyright 2017 Remko Popma
+
+TimeoutBlockingWaitStrategy.java and parts of Util.java
+Copyright 2011 LMAX Ltd.