diff --git a/clients/src/main/java/org/apache/kafka/clients/admin/DescribeClusterResult.java b/clients/src/main/java/org/apache/kafka/clients/admin/DescribeClusterResult.java
index 3a4c40cad08..69782d5c9c3 100644
--- a/clients/src/main/java/org/apache/kafka/clients/admin/DescribeClusterResult.java
+++ b/clients/src/main/java/org/apache/kafka/clients/admin/DescribeClusterResult.java
@@ -61,8 +61,7 @@ public class DescribeClusterResult {
     }
 
     /**
-     * Returns a future which yields the current cluster id. The future value will be non-null if the
-     * broker version is 0.10.1.0 or higher and null otherwise.
+     * Returns a future which yields the current cluster id.
      */
     public KafkaFuture<String> clusterId() {
         return clusterId;
diff --git a/clients/src/main/java/org/apache/kafka/common/ClusterResource.java b/clients/src/main/java/org/apache/kafka/common/ClusterResource.java
index 2f857ff5609..aad5c3d6d85 100644
--- a/clients/src/main/java/org/apache/kafka/common/ClusterResource.java
+++ b/clients/src/main/java/org/apache/kafka/common/ClusterResource.java
@@ -28,8 +28,7 @@ public class ClusterResource {
 
     /**
      * Create {@link ClusterResource} with a cluster id. Note that cluster id may be {@code null} if the
-     * metadata request was sent to a broker without support for cluster ids. The first version of Kafka
-     * to support cluster id is 0.10.1.0.
+     * metadata request was sent to a broker without support for cluster ids.
      * @param clusterId The cluster id
      */
     public ClusterResource(String clusterId) {
@@ -38,7 +37,7 @@ public class ClusterResource {
 
     /**
      * Return the cluster id. Note that it may be {@code null} if the metadata request was sent to a broker without
-     * support for cluster ids. The first version of Kafka to support cluster id is 0.10.1.0.
+     * support for cluster ids.
      */
     public String clusterId() {
         return clusterId;
diff --git a/clients/src/main/java/org/apache/kafka/common/ClusterResourceListener.java b/clients/src/main/java/org/apache/kafka/common/ClusterResourceListener.java
index f1939df2955..4413e83a941 100644
--- a/clients/src/main/java/org/apache/kafka/common/ClusterResourceListener.java
+++ b/clients/src/main/java/org/apache/kafka/common/ClusterResourceListener.java
@@ -24,7 +24,7 @@ package org.apache.kafka.common;
  * <p>
  * <h4>Clients</h4>
  * There will be one invocation of {@link ClusterResourceListener#onUpdate(ClusterResource)} after each metadata response.
- * Note that the cluster id may be null when the Kafka broker version is below 0.10.1.0. If you receive a null cluster id, you can expect it to always be null unless you have a cluster with multiple broker versions which can happen if the cluster is being upgraded while the client is running.
+ * Note the minimum supported broker version is 2.1.
  * <p>
  * {@link org.apache.kafka.clients.producer.ProducerInterceptor} : The {@link ClusterResourceListener#onUpdate(ClusterResource)} method will be invoked after {@link org.apache.kafka.clients.producer.ProducerInterceptor#onSend(org.apache.kafka.clients.producer.ProducerRecord)}
  * but before {@link org.apache.kafka.clients.producer.ProducerInterceptor#onAcknowledgement(org.apache.kafka.clients.producer.RecordMetadata, Exception)} .
diff --git a/clients/src/main/java/org/apache/kafka/common/config/TopicConfig.java b/clients/src/main/java/org/apache/kafka/common/config/TopicConfig.java
index 10d6024163b..d8043e9be9d 100755
--- a/clients/src/main/java/org/apache/kafka/common/config/TopicConfig.java
+++ b/clients/src/main/java/org/apache/kafka/common/config/TopicConfig.java
@@ -107,8 +107,6 @@ public class TopicConfig {
     public static final String MAX_MESSAGE_BYTES_CONFIG = "max.message.bytes";
     public static final String MAX_MESSAGE_BYTES_DOC =
         "The largest record batch size allowed by Kafka (after compression if compression is enabled). " +
-        "If this is increased and there are consumers older than 0.10.2, the consumers' fetch " +
-        "size must also be increased so that they can fetch record batches this large. " +
         "In the latest message format version, records are always grouped into batches for efficiency. " +
         "In previous message format versions, uncompressed records are not grouped into batches and this " +
         "limit only applies to a single record in that case.";