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

Co-authored-by: Copilot <[email protected]>

Author: lucasbru

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

@@ -102,9 +102,10 @@ public StreamsGroupDescribeResponseData.Topology asStreamsGroupDescribeTopology(
         return new StreamsGroupDescribeResponseData.Topology()
             .setEpoch(topologyEpoch)
             .setSubtopologies(
-                subtopologies.entrySet().stream().map(
-                    entry -> asStreamsGroupDescribeSubtopology(entry.getKey(), entry.getValue())
-                ).toList()
+                subtopologies.entrySet().stream()
+                    .sorted(Map.Entry.comparingByKey())
+                    .map(entry -> asStreamsGroupDescribeSubtopology(entry.getKey(), entry.getValue()))
+                    .toList()
             );
     }