From 3f80348a1625f825bbb65729a01b6b384160b965 Mon Sep 17 00:00:00 2001
From: Derek Collison <derek@nats.io>
Date: Tue, 12 Sep 2023 07:43:14 -0700
Subject: [PATCH] Fix for data race in accessing rg.node

Signed-off-by: Derek Collison <derek@nats.io>
---
 server/jetstream_cluster.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/server/jetstream_cluster.go b/server/jetstream_cluster.go
index 149b585d..90485042 100644
--- a/server/jetstream_cluster.go
+++ b/server/jetstream_cluster.go
@@ -3642,8 +3642,13 @@ func (js *jetStream) processClusterCreateStream(acc *Account, sa *streamAssignme
 		return
 	}
 
+	// Re-capture node.
+	js.mu.RLock()
+	node := rg.node
+	js.mu.RUnlock()
+
 	// Start our monitoring routine.
-	if rg.node != nil {
+	if node != nil {
 		if !alreadyRunning {
 			if mset != nil {
 				mset.monitorWg.Add(1)