diff --git a/symmetric/symmetric-ds/src/main/java/org/jumpmind/symmetric/route/SimpleRouterContext.java b/symmetric/symmetric-ds/src/main/java/org/jumpmind/symmetric/route/SimpleRouterContext.java
index 9c0e60b2bb..30929cecbc 100644
--- a/symmetric/symmetric-ds/src/main/java/org/jumpmind/symmetric/route/SimpleRouterContext.java
+++ b/symmetric/symmetric-ds/src/main/java/org/jumpmind/symmetric/route/SimpleRouterContext.java
@@ -1,6 +1,7 @@
 package org.jumpmind.symmetric.route;
 
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
@@ -78,7 +79,7 @@ public long getStat(String name) {
 
     public void logStats(ILog log, int dataCount, long totalTimeInMs) {
         boolean infoLevel = totalTimeInMs > 30000;
-        Set<String> keys = contextCache.keySet();
+        Set<String> keys = new HashSet<String>(contextCache.keySet());
         for (String key : keys) {
             if (key.startsWith("Stat.")) {
                 String keyString = key.substring(key.indexOf(".") + 1);