From 62c76fb625ede6326c3e14c491218a114a551b92 Mon Sep 17 00:00:00 2001
From: Henning Baldersheim <balder@yahoo-inc.com>
Date: Tue, 21 Sep 2021 17:47:07 +0200
Subject: Add synchronization.

---
 .../java/ai/vespa/metricsproxy/service/ConfigSentinelClient.java   | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'metrics-proxy')

diff --git a/metrics-proxy/src/main/java/ai/vespa/metricsproxy/service/ConfigSentinelClient.java b/metrics-proxy/src/main/java/ai/vespa/metricsproxy/service/ConfigSentinelClient.java
index 9236c68ec87..3d834106ebc 100644
--- a/metrics-proxy/src/main/java/ai/vespa/metricsproxy/service/ConfigSentinelClient.java
+++ b/metrics-proxy/src/main/java/ai/vespa/metricsproxy/service/ConfigSentinelClient.java
@@ -35,8 +35,11 @@ public class ConfigSentinelClient extends AbstractComponent {
 
     @Override
     public void deconstruct() {
-        if (connection != null) {
-            connection.close();
+        synchronized (this) {
+            if (connection != null) {
+                connection.close();
+                connection = null;
+            }
         }
         supervisor.transport().shutdown().join();
         super.deconstruct();
-- 
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