From 5c0fd5651acf84fa29b75a95a464bec96556bfd7 Mon Sep 17 00:00:00 2001
From: mjaow <mjaow0128@gmail.com>
Date: Wed, 30 Jan 2019 10:25:16 +0800
Subject: [PATCH] Add volatile in double-checked locking field in
 ClusterBuilderSlot (#466)

---
 .../csp/sentinel/slots/clusterbuilder/ClusterBuilderSlot.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/clusterbuilder/ClusterBuilderSlot.java b/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/clusterbuilder/ClusterBuilderSlot.java
index 31ef6b65..acbc3895 100755
--- a/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/clusterbuilder/ClusterBuilderSlot.java
+++ b/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/clusterbuilder/ClusterBuilderSlot.java
@@ -70,7 +70,7 @@ public class ClusterBuilderSlot extends AbstractLinkedProcessorSlot<DefaultNode>
 
     private static final Object lock = new Object();
 
-    private ClusterNode clusterNode = null;
+    private volatile ClusterNode clusterNode = null;
 
     @Override
     public void entry(Context context, ResourceWrapper resourceWrapper, DefaultNode node, int count,