From 5349a5c49b41dab3b4ca35d6291a4e687302e664 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=83=E9=94=8B?= <jianghang.loujh@alibaba-inc.com>
Date: Tue, 5 Jun 2018 16:04:07 +0800
Subject: [PATCH] fixed issue #657, fixed ConcurrentModificationException

---
 .../java/com/alibaba/otter/canal/meta/MemoryMetaManager.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/src/main/java/com/alibaba/otter/canal/meta/MemoryMetaManager.java b/meta/src/main/java/com/alibaba/otter/canal/meta/MemoryMetaManager.java
index 4d6072d8..d5e040a6 100644
--- a/meta/src/main/java/com/alibaba/otter/canal/meta/MemoryMetaManager.java
+++ b/meta/src/main/java/com/alibaba/otter/canal/meta/MemoryMetaManager.java
@@ -83,7 +83,8 @@ public class MemoryMetaManager extends AbstractCanalLifeCycle implements CanalMe
     }
 
     public synchronized List<ClientIdentity> listAllSubscribeInfo(String destination) throws CanalMetaManagerException {
-        return destinations.get(destination);
+        // fixed issue #657, fixed ConcurrentModificationException
+        return Lists.newArrayList(destinations.get(destination));
     }
 
     public Position getCursor(ClientIdentity clientIdentity) throws CanalMetaManagerException {