From 47ac10ca185ef128ccdd055cb83fea5def7428c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=83=E9=94=8B?= <jianghang.loujh@alibaba-inc.com>
Date: Tue, 4 Sep 2018 11:28:56 +0800
Subject: [PATCH] fixed issue #868 , NPE fixed

---
 .../otter/canal/store/memory/MemoryEventStoreWithBuffer.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/store/src/main/java/com/alibaba/otter/canal/store/memory/MemoryEventStoreWithBuffer.java b/store/src/main/java/com/alibaba/otter/canal/store/memory/MemoryEventStoreWithBuffer.java
index fb74d5f8..6c6d08ff 100644
--- a/store/src/main/java/com/alibaba/otter/canal/store/memory/MemoryEventStoreWithBuffer.java
+++ b/store/src/main/java/com/alibaba/otter/canal/store/memory/MemoryEventStoreWithBuffer.java
@@ -435,7 +435,7 @@ public class MemoryEventStoreWithBuffer extends AbstractCanalStoreScavenge imple
                     if (batchMode.isMemSize()) {
                         ackMemSize.addAndGet(memsize);
                         // 尝试清空buffer中的内存，将ack之前的内存全部释放掉
-                        for (long index = sequence + 1; index <= next; index++) {
+                        for (long index = sequence + 1; index < next; index++) {
                             entries[getIndex(index)] = null;// 设置为null
                         }
                     }