From 5447ecbcfa8c21203fb490e7f9ebd2072a3ea085 Mon Sep 17 00:00:00 2001
From: Matt Pavlovich <mattrpav@apache.org>
Date: Tue, 4 Aug 2026 10:05:30 -0500
Subject: [PATCH] [#2400] Make networkBridgeListener volatile for safe
 cross-thread publication

The listener is set from the connector setup thread and read from
transport and executor threads via local snapshots; without volatile the
JMM does not guarantee those reads observe the write.
---
 .../apache/activemq/network/DemandForwardingBridgeSupport.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/activemq-broker/src/main/java/org/apache/activemq/network/DemandForwardingBridgeSupport.java b/activemq-broker/src/main/java/org/apache/activemq/network/DemandForwardingBridgeSupport.java
index c8bb1386c5f..bddbb6b6c74 100644
--- a/activemq-broker/src/main/java/org/apache/activemq/network/DemandForwardingBridgeSupport.java
+++ b/activemq-broker/src/main/java/org/apache/activemq/network/DemandForwardingBridgeSupport.java
@@ -156,7 +156,7 @@ public abstract class DemandForwardingBridgeSupport implements NetworkBridge, Br
 
     protected final NetworkBridgeStatistics networkBridgeStatistics = new NetworkBridgeStatistics();
 
-    private NetworkBridgeListener networkBridgeListener;
+    private volatile NetworkBridgeListener networkBridgeListener;
     private boolean createdByDuplex;
     private BrokerInfo localBrokerInfo;
     private BrokerInfo remoteBrokerInfo;