From 00ee9491d9e21b85f44f23e05bc1bd6fd82dc2cc Mon Sep 17 00:00:00 2001
From: gtully <gary.tully@gmail.com>
Date: Mon, 29 May 2017 11:21:00 +0100
Subject: [PATCH] [AMQ-6678] sync destructive purge on queue view mbean (jmx)
 to prevent concurrent calls

---
 .../src/main/java/org/apache/activemq/broker/jmx/QueueView.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/QueueView.java b/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/QueueView.java
index 528e10c262..372bb80283 100644
--- a/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/QueueView.java
+++ b/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/QueueView.java
@@ -56,7 +56,7 @@ public class QueueView extends DestinationView implements QueueViewMBean {
         return result;
     }
 
-    public void purge() throws Exception {
+    public synchronized void purge() throws Exception {
         final long originalMessageCount = destination.getDestinationStatistics().getMessages().getCount();
 
         ((Queue)destination).purge();