Page History

diff --git a/clients/src/main/resources/common/message/LeaderAndIsrRequest.json b/clients/src/main/resources/common/message/LeaderAndIsrRequest.json
index b8988351c..d45727078 100644
--- a/clients/src/main/resources/common/message/LeaderAndIsrRequest.json
+++ b/clients/src/main/resources/common/message/LeaderAndIsrRequest.json
@@ -20,6 +20,8 @@
   // Version 1 adds IsNew.
   //
   // Version 2 adds broker epoch and reorganizes the partitions by topic.
+  //
+  // Version 3 adds AddingReplicas and RemovingReplicas.
   "validVersions": "0-3",
   "fields": [
     { "name": "ControllerId", "type": "int32", "versions": "0+",
@@ -48,6 +50,8 @@
           "about": "The ZooKeeper version." },
         { "name": "Replicas", "type": "[]int32", "versions": "0+",
           "about": "The replica IDs." },
+        { "name": "AddingReplicas", "type": "[]int32", "versions": "3+",
+          "about": "The replica IDs that we are adding this partition to." },
+        { "name": "RetiringReplicasRemovingReplicas", "type": "[]int32", "versions": "3+",
+          "about": "The replica IDs that we are removing this partition from." },
         { "name": "IsNew", "type": "bool", "versions": "1+", "default": "false", "ignorable": true, 
           "about": "Whether the replica should have existed on the broker or not." }
       ]}

# Illustrating the rebalance of a single partition.
# R is the current replicas, I is the ISR list, RR is retiringReplicasremovingReplicas and AR is addingReplicas
R: [1, 2, 3], I: [1, 2, 3], AR: [], RR: []
# Reassignment called via API with targetReplicas=[3, 4, 5]
R: [1, 2, 3, 4, 5], I: [1, 2, 3], AR: [4, 5], RR: []
R: [1, 2, 3, 4, 5], I: [1, 2, 3, 4], AR: [5], RR: []
# Cancellation called
R: [1, 2, 3, 4], I: [1, 2, 3, 4], AR: [], RR: []