From 4faad81f50f044b1ed92daae58e1e01e23c864fc Mon Sep 17 00:00:00 2001
From: fayadexinqing <2418967201@qq.com>
Date: Thu, 30 Jul 2020 09:05:27 +0800
Subject: [PATCH] broadcast a PONG message when slot's migration is over, which
 may reduce the moved request of clients (#7571)

---
 src/cluster.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cluster.c b/src/cluster.c
index 350aa7b6a..8860bfc14 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -4522,6 +4522,9 @@ NULL
                         "configEpoch updated after importing slot %d", slot);
                 }
                 server.cluster->importing_slots_from[slot] = NULL;
+                /* After importing this slot, let the other nodes know as
+                 * soon as possible. */
+                clusterBroadcastPong(CLUSTER_BROADCAST_ALL);
             }
             clusterDelSlot(slot);
             clusterAddSlot(n,slot);