MINOR: Change Streams group to streams group

clients/src/main/java/org/apache/kafka/clients/admin/Admin.java

@@ -951,24 +951,24 @@ default ListConsumerGroupOffsetsResult listConsumerGroupOffsets(Map<String, List
     }
 
     /**
-     * List the Streams group offsets available in the cluster for the specified Streams groups.
+     * List the streams group offsets available in the cluster for the specified streams groups.
      *
      * <em>Note</em>: this method effectively does the same as the corresponding consumer group method {@link Admin#listConsumerGroupOffsets} does.
      *
-     * @param groupSpecs Map of Streams group ids to a spec that specifies the topic partitions of the group to list offsets for.
+     * @param groupSpecs Map of streams group ids to a spec that specifies the topic partitions of the group to list offsets for.
      *
-     * @param options The options to use when listing the Streams group offsets.
+     * @param options The options to use when listing the streams group offsets.
      * @return The ListStreamsGroupOffsetsResult
      */
     ListStreamsGroupOffsetsResult listStreamsGroupOffsets(Map<String, ListStreamsGroupOffsetsSpec> groupSpecs, ListStreamsGroupOffsetsOptions options);
 
     /**
-     * List the Streams group offsets available in the cluster for the specified groups with the default options.
+     * List the streams group offsets available in the cluster for the specified groups with the default options.
      * <p>
      * This is a convenience method for
      * {@link #listStreamsGroupOffsets(Map, ListStreamsGroupOffsetsOptions)} with default options.
      *
-     * @param groupSpecs Map of Streams group ids to a spec that specifies the topic partitions of the group to list offsets for.
+     * @param groupSpecs Map of streams group ids to a spec that specifies the topic partitions of the group to list offsets for.
      * @return The ListStreamsGroupOffsetsResult.
      */
     default ListStreamsGroupOffsetsResult listStreamsGroupOffsets(Map<String, ListStreamsGroupOffsetsSpec> groupSpecs) {
@@ -993,17 +993,17 @@ default DeleteConsumerGroupsResult deleteConsumerGroups(Collection<String> group
     }
 
     /**
-     * Delete Streams groups from the cluster.
+     * Delete streams groups from the cluster.
      *
      * <em>Note</em>: this method effectively does the same as the corresponding consumer group method {@link Admin#deleteConsumerGroups} does.
      *
-     * @param options The options to use when deleting a Streams group.
+     * @param options The options to use when deleting a streams group.
      * @return The DeleteStreamsGroupsResult.
      */
     DeleteStreamsGroupsResult deleteStreamsGroups(Collection<String> groupIds, DeleteStreamsGroupsOptions options);
 
     /**
-     * Delete Streams groups from the cluster with the default options.
+     * Delete streams groups from the cluster with the default options.
      *
      * @return The DeleteStreamsGroupResult.
      */
@@ -1035,21 +1035,21 @@ default DeleteConsumerGroupOffsetsResult deleteConsumerGroupOffsets(String group
     }
 
     /**
-     * Delete committed offsets for a set of partitions in a Streams group. This will
+     * Delete committed offsets for a set of partitions in a streams group. This will
      * succeed at the partition level only if the group is not actively subscribed
      * to the corresponding topic.
      *
      * <em>Note</em>: this method effectively does the same as the corresponding consumer group method {@link Admin#deleteConsumerGroupOffsets} does.
      *
-     * @param options The options to use when deleting offsets in a Streams group.
+     * @param options The options to use when deleting offsets in a streams group.
      * @return The DeleteStreamsGroupOffsetsResult.
      */
     DeleteStreamsGroupOffsetsResult deleteStreamsGroupOffsets(String groupId,
                                                                 Set<TopicPartition> partitions,
                                                                 DeleteStreamsGroupOffsetsOptions options);
 
     /**
-     * Delete committed offsets for a set of partitions in a Streams group with the default
+     * Delete committed offsets for a set of partitions in a streams group with the default
      * options. This will succeed at the partition level only if the group is not actively
      * subscribed to the corresponding topic.
      *

clients/src/main/java/org/apache/kafka/clients/admin/ListStreamsGroupOffsetsSpec.java

@@ -23,7 +23,7 @@
 import java.util.Collection;
 
 /**
- * Specification of Streams group offsets to list using {@link Admin#listStreamsGroupOffsets(Map, ListStreamsGroupOffsetsOptions)}.
+ * Specification of streams group offsets to list using {@link Admin#listStreamsGroupOffsets(Map, ListStreamsGroupOffsetsOptions)}.
  * <p>
  * The API of this class is evolving, see {@link Admin} for details.
  */
@@ -33,15 +33,15 @@ public class ListStreamsGroupOffsetsSpec {
     private Collection<TopicPartition> topicPartitions;
 
     /**
-     * Set the topic partitions whose offsets are to be listed for a Streams group.
+     * Set the topic partitions whose offsets are to be listed for a streams group.
      */
     ListStreamsGroupOffsetsSpec topicPartitions(Collection<TopicPartition> topicPartitions) {
         this.topicPartitions = topicPartitions;
         return this;
     }
 
     /**
-     * Returns the topic partitions whose offsets are to be listed for a Streams group.
+     * Returns the topic partitions whose offsets are to be listed for a streams group.
      */
     Collection<TopicPartition> topicPartitions() {
         return topicPartitions;

clients/src/main/java/org/apache/kafka/clients/consumer/internals/StreamsGroupHeartbeatRequestManager.java

@@ -52,7 +52,7 @@
 import static org.apache.kafka.clients.consumer.internals.NetworkClientDelegate.PollResult.EMPTY;
 
 /**
- * <p>Manages the request creation and response handling for the Streams group heartbeat. The class creates a
+ * <p>Manages the request creation and response handling for the streams group heartbeat. The class creates a
  * heartbeat request using the state stored in the membership manager. The requests can be retrieved
  * by calling {@link StreamsGroupHeartbeatRequestManager#poll(long)}. Once the response is received, it updates the
  * state in the membership manager and handles any errors.

clients/src/main/java/org/apache/kafka/clients/consumer/internals/StreamsMembershipManager.java

@@ -173,7 +173,7 @@ public int hashCode() {
     private MemberState state;
 
     /**
-     * Group ID of the Streams group the member will be part of, provided when creating the current
+     * Group ID of the streams group the member will be part of, provided when creating the current
      * membership manager.
      */
     private final String groupId;

clients/src/main/java/org/apache/kafka/clients/consumer/internals/StreamsRebalanceListener.java

@@ -20,7 +20,7 @@
 import java.util.Set;
 
 /**
- * Listener for handling Streams group rebalance events in Kafka Streams.
+ * Listener for handling streams group rebalance events in Kafka Streams.
  */
 public interface StreamsRebalanceListener {
 

clients/src/main/java/org/apache/kafka/clients/consumer/internals/events/ApplicationEventProcessor.java

@@ -497,7 +497,7 @@ private void process(final LeaveGroupOnCloseEvent event) {
             CompletableFuture<Void> future = requestManagers.consumerMembershipManager.get().leaveGroupOnClose(event.membershipOperation());
             future.whenComplete(complete(event.future()));
         } else if (requestManagers.streamsMembershipManager.isPresent()) {
-            log.debug("Signal the StreamsMembershipManager to leave the Streams group since the member is closing");
+            log.debug("Signal the StreamsMembershipManager to leave the streams group since the member is closing");
             CompletableFuture<Void> future = requestManagers.streamsMembershipManager.get().leaveGroupOnClose();
             future.whenComplete(complete(event.future()));
         }

group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupMetadataManager.java

@@ -1643,7 +1643,7 @@ private void throwIfStreamsGroupIsFull(
     /**
      * Validates the member epoch provided in the heartbeat request.
      *
-     * @param member                The Streams group member.
+     * @param member                The streams group member.
      * @param receivedMemberEpoch   The member epoch.
      * @param ownedActiveTasks      The owned active tasks.
      * @param ownedStandbyTasks     The owned standby tasks.
@@ -1798,7 +1798,7 @@ private static ConsumerProtocolSubscription deserializeSubscription(
     }
 
     /**
-     * Handles a regular heartbeat from a Streams group member.
+     * Handles a regular heartbeat from a streams group member.
      * It mainly consists of five parts:
      * 1) Create or update the member.
      *    The group epoch is bumped if the member has been created or updated.
@@ -5248,8 +5248,8 @@ public void replay(
 
     /**
      * Replays StreamsGroupMetadataKey/Value to update the hard state of
-     * the Streams group. It updates the group epoch of the Streams
-     * group or deletes the Streams group.
+     * the streams group. It updates the group epoch of the Streams
+     * group or deletes the streams group.
      *
      * @param key   A StreamsGroupMetadataKey key.
      * @param value A StreamsGroupMetadataValue record.

group-coordinator/src/main/java/org/apache/kafka/coordinator/group/streams/StreamsGroupMember.java

@@ -31,7 +31,7 @@
 import java.util.stream.Collectors;
 
 /**
- * Contains all information related to a member within a Streams group.
+ * Contains all information related to a member within a streams group.
  * <p>
  * This class is immutable and is fully backed by records stored in the __consumer_offsets topic.
  *
@@ -322,7 +322,7 @@ public boolean isReconciledTo(int targetAssignmentEpoch) {
     }
 
     /**
-     * Creates a member description for the Streams group describe response from this member.
+     * Creates a member description for the streams group describe response from this member.
      *
      * @param targetAssignment The target assignment of this member in the corresponding group.
      *

group-coordinator/src/main/java/org/apache/kafka/coordinator/group/streams/assignor/AssignmentMemberSpec.java

@@ -23,7 +23,7 @@
 import java.util.Set;
 
 /**
- * The assignment specification for a Streams group member.
+ * The assignment specification for a streams group member.
  *
  * @param instanceId   The instance ID if provided.
  * @param rackId       The rack ID if provided.

group-coordinator/src/main/java/org/apache/kafka/coordinator/group/streams/assignor/GroupSpecImpl.java

@@ -20,7 +20,7 @@
 import java.util.Objects;
 
 /**
- * The assignment specification for a Streams group.
+ * The assignment specification for a streams group.
  *
  * @param members           The member metadata keyed by member ID.
  * @param assignmentConfigs Any configurations passed to the assignor.

group-coordinator/src/main/java/org/apache/kafka/coordinator/group/streams/assignor/MemberAssignment.java

@@ -21,7 +21,7 @@
 import java.util.Set;
 
 /**
- * The task assignment for a Streams group member.
+ * The task assignment for a streams group member.
  *
  * @param activeTasks  The active tasks assigned to this member keyed by subtopologyId.
  * @param standbyTasks The standby tasks assigned to this member keyed by subtopologyId.