Merge branch '2.2.x' into 2.3.x

Closes gh-22023

Author: snicoll

spring-boot-project/spring-boot-docs/src/docs/asciidoc/appendix-configuration-metadata.adoc

@@ -708,6 +708,30 @@ With Maven the dependency should be declared as optional, as shown in the follow
 	</dependency>
 ----
 
+If you have defined `@ConfigurationProperties` in your application, make sure to configure the `spring-boot-maven-plugin` to prevent the `repackage` goal from adding the dependency into the fat jar:
+
+[source,xml,indent=0,subs="verbatim,quotes,attributes"]
+----
+	<project>
+		<build>
+			<plugins>
+				<plugin>
+					<groupId>org.springframework.boot</groupId>
+					<artifactId>spring-boot-maven-plugin</artifactId>
+					<configuration>
+						<excludes>
+							<exclude>
+								<groupId>org.springframework.boot</groupId>
+								<artifactId>spring-boot-configuration-processor</artifactId>
+							</exclude>
+						</excludes>
+					</configuration>
+				</plugin>
+			</plugins>
+		</build>
+	</project>
+----
+
 With Gradle 4.5 and earlier, the dependency should be declared in the `compileOnly` configuration, as shown in the following example:
 
 [source,groovy,indent=0,subs="verbatim,quotes,attributes"]

spring-boot-project/spring-boot-docs/src/docs/asciidoc/spring-boot-features.adoc

@@ -7934,6 +7934,30 @@ It is recommended to add the following dependency in a module that contains auto
 	</dependency>
 ----
 
+If you have defined auto-configurations directly in your application, make sure to configure the `spring-boot-maven-plugin` to prevent the `repackage` goal from adding the dependency into the fat jar:
+
+[source,xml,indent=0,subs="verbatim,quotes,attributes"]
+----
+	<project>
+		<build>
+			<plugins>
+				<plugin>
+					<groupId>org.springframework.boot</groupId>
+					<artifactId>spring-boot-maven-plugin</artifactId>
+					<configuration>
+						<excludes>
+							<exclude>
+								<groupId>org.springframework.boot</groupId>
+								<artifactId>spring-boot-autoconfigure-processor</artifactId>
+							</exclude>
+						</excludes>
+					</configuration>
+				</plugin>
+			</plugins>
+		</build>
+	</project>
+----
+
 With Gradle 4.5 and earlier, the dependency should be declared in the `compileOnly` configuration, as shown in the following example:
 
 [source,groovy,indent=0,subs="verbatim,quotes,attributes"]