Polish

See gh-14271

Author: snicoll

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/kafka/KafkaProperties.java

@@ -57,7 +57,7 @@ public class KafkaProperties {
 
 	/**
 	 * Comma-delimited list of host:port pairs to use for establishing the initial
-	 * connection to the Kafka cluster.
+	 * connections to the Kafka cluster. Applies to all components unless overridden.
 	 */
 	private List<String> bootstrapServers = new ArrayList<>(
 			Collections.singletonList("localhost:9092"));
@@ -211,7 +211,7 @@ public static class Consumer {
 
 		/**
 		 * Comma-delimited list of host:port pairs to use for establishing the initial
-		 * connection to the Kafka cluster.
+		 * connections to the Kafka cluster. Overrides the global property, for consumers.
 		 */
 		private List<String> bootstrapServers;
 
@@ -421,7 +421,7 @@ public static class Producer {
 
 		/**
 		 * Comma-delimited list of host:port pairs to use for establishing the initial
-		 * connection to the Kafka cluster.
+		 * connections to the Kafka cluster. Overrides the global property, for producers.
 		 */
 		private List<String> bootstrapServers;
 

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -1000,11 +1000,11 @@ content into your application. Rather, pick only the properties that you need.
 	spring.kafka.admin.ssl.truststore-location= # Location of the trust store file.
 	spring.kafka.admin.ssl.truststore-password= # Store password for the trust store file.
 	spring.kafka.admin.ssl.truststore-type= # Type of the trust store.
-	spring.kafka.bootstrap-servers= # Comma-delimited list of host:port pairs to use for establishing the initial connection to the Kafka cluster.
+	spring.kafka.bootstrap-servers= # Comma-delimited list of host:port pairs to use for establishing the initial connections to the Kafka cluster. Applies to all components unless overridden.
 	spring.kafka.client-id= # ID to pass to the server when making requests. Used for server-side logging.
 	spring.kafka.consumer.auto-commit-interval= # Frequency with which the consumer offsets are auto-committed to Kafka if 'enable.auto.commit' is set to true.
 	spring.kafka.consumer.auto-offset-reset= # What to do when there is no initial offset in Kafka or if the current offset no longer exists on the server.
-	spring.kafka.consumer.bootstrap-servers= # Comma-delimited list of host:port pairs to use for establishing the initial connection to the Kafka cluster.
+	spring.kafka.consumer.bootstrap-servers= # Comma-delimited list of host:port pairs to use for establishing the initial connections to the Kafka cluster. Overrides the global property, for consumers.
 	spring.kafka.consumer.client-id= # ID to pass to the server when making requests. Used for server-side logging.
 	spring.kafka.consumer.enable-auto-commit= # Whether the consumer's offset is periodically committed in the background.
 	spring.kafka.consumer.fetch-max-wait= # Maximum amount of time the server blocks before answering the fetch request if there isn't sufficient data to immediately satisfy the requirement given by "fetch.min.bytes".
@@ -1040,7 +1040,7 @@ content into your application. Rather, pick only the properties that you need.
 	spring.kafka.listener.type=single # Listener type.
 	spring.kafka.producer.acks= # Number of acknowledgments the producer requires the leader to have received before considering a request complete.
 	spring.kafka.producer.batch-size= # Default batch size in bytes.
-	spring.kafka.producer.bootstrap-servers= # Comma-delimited list of host:port pairs to use for establishing the initial connection to the Kafka cluster.
+	spring.kafka.producer.bootstrap-servers= # Comma-delimited list of host:port pairs to use for establishing the initial connections to the Kafka cluster. Overrides the global property, for producers.
 	spring.kafka.producer.buffer-memory= # Total bytes of memory the producer can use to buffer records waiting to be sent to the server.
 	spring.kafka.producer.client-id= # ID to pass to the server when making requests. Used for server-side logging.
 	spring.kafka.producer.compression-type= # Compression type for all data generated by the producer.