[FLINK-36997] Add Log4j JSONTemplateLayout to flink-dist (apache#25888)

Author: ryanvanhuuksloot

docs/content.zh/docs/deployment/advanced/logging.md

@@ -50,7 +50,18 @@ Flink adds the following fields to [MDC](https://www.slf4j.org/api/org/slf4j/MDC
 
 This is most useful in environments with structured logging and allows you to quickly filter the relevant logs.
 
-The MDC is propagated by slf4j to the logging backend which usually adds it to the log records automatically (e.g. in [log4j json layout](https://logging.apache.org/log4j/2.x/manual/json-template-layout.html)).
+The MDC is propagated by slf4j to the logging backend which usually adds it to the log records automatically (e.g. in [log4j2 json layout](https://logging.apache.org/log4j/2.x/manual/json-template-layout.html#event-template-resolver-mdc).
+
+#### Log4j 2 JsonTemplateLayout
+
+> JsonTemplateLayout is a customizable, efficient, and garbage-free JSON generating layout. It encodes LogEvents according to the structure described by the JSON template provided.
+
+The required jar `log4j-layout-template-json` is bundled in the flink-dist for convenience.
+
+For example templates, see the [Event Templates](https://logging.apache.org/log4j/2.x/manual/json-template-layout.html#event-templates).
+
+#### Log4j 2 PatternLayout
+
 Alternatively, it can be configured explicitly - [log4j pattern layout](https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/PatternLayout.html) might look like this:
 
 `[%-32X{flink-job-id}] %c{0} %m%n`.

docs/content/docs/deployment/advanced/logging.md

@@ -48,7 +48,18 @@ Flink adds the following fields to [MDC](https://www.slf4j.org/api/org/slf4j/MDC
 
 This is most useful in environments with structured logging and allows you to quickly filter the relevant logs.
 
-The MDC is propagated by slf4j to the logging backend which usually adds it to the log records automatically (e.g. in [log4j json layout](https://logging.apache.org/log4j/2.x/manual/json-template-layout.html)).
+The MDC is propagated by slf4j to the logging backend which usually adds it to the log records automatically (e.g. in [log4j2 json layout](https://logging.apache.org/log4j/2.x/manual/json-template-layout.html#event-template-resolver-mdc).
+
+#### Log4j 2 JsonTemplateLayout
+
+> JsonTemplateLayout is a customizable, efficient, and garbage-free JSON generating layout. It encodes LogEvents according to the structure described by the JSON template provided.
+
+The required jar `log4j-layout-template-json` is bundled in the flink-dist for convenience.
+
+For example templates, see the [Event Templates](https://logging.apache.org/log4j/2.x/manual/json-template-layout.html#event-templates).
+
+#### Log4j 2 PatternLayout
+
 Alternatively, it can be configured explicitly - [log4j pattern layout](https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/PatternLayout.html) might look like this:
 
 `[%-32X{flink-job-id}] %c{0} %m%n`.

flink-dist/pom.xml

@@ -190,6 +190,12 @@ under the License.
 			<scope>compile</scope>
 		</dependency>
 
+		<dependency>
+			<groupId>org.apache.logging.log4j</groupId>
+			<artifactId>log4j-layout-template-json</artifactId>
+			<scope>compile</scope>
+		</dependency>
+
 		<!-- Table dependencies -->
 
 		<dependency>

flink-dist/src/main/assemblies/bin.xml

@@ -42,6 +42,7 @@ under the License.
 				<include>org.apache.logging.log4j:log4j-core</include>
 				<include>org.apache.logging.log4j:log4j-slf4j-impl</include>
 				<include>org.apache.logging.log4j:log4j-1.2-api</include>
+				<include>org.apache.logging.log4j:log4j-layout-template-json</include>
 			</includes>
 		</dependencySet>
 	</dependencySets>

pom.xml

@@ -523,6 +523,12 @@ under the License.
 				<version>${log4j.version}</version>
 			</dependency>
 
+			<dependency>
+				<groupId>org.apache.logging.log4j</groupId>
+				<artifactId>log4j-layout-template-json</artifactId>
+				<version>${log4j.version}</version>
+			</dependency>
+
 			<dependency>
 				<!-- API bridge between log4j 1 and 2 -->
 				<groupId>org.apache.logging.log4j</groupId>