From e6c7746c8a0c7e65d9e4b345035356ea6b1cd844 Mon Sep 17 00:00:00 2001
From: Yichao Yang <yichao@temporal.io>
Date: Thu, 1 Sep 2022 11:16:57 -0700
Subject: [PATCH] Improve host task schedule namespace change callback

---
 service/history/queues/scheduler.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/service/history/queues/scheduler.go b/service/history/queues/scheduler.go
index 7e7180b7399..0928952acae 100644
--- a/service/history/queues/scheduler.go
+++ b/service/history/queues/scheduler.go
@@ -181,6 +181,18 @@ func (s *schedulerImpl) Start() {
 			0,
 			func() {}, // no-op
 			func(oldNamespaces, newNamespaces []*namespace.Namespace) {
+				namespaceFailover := false
+				for idx := range oldNamespaces {
+					if oldNamespaces[idx].FailoverVersion() != newNamespaces[idx].FailoverVersion() {
+						namespaceFailover = true
+						break
+					}
+				}
+
+				if !namespaceFailover {
+					return
+				}
+
 				select {
 				case s.channelWeightUpdateCh <- struct{}{}:
 				default: