diff --git a/src/main/java/com/alipay/oceanbase/hbase/util/OHBufferedMutatorImpl.java b/src/main/java/com/alipay/oceanbase/hbase/util/OHBufferedMutatorImpl.java
index d6e63d40..52d8624b 100644
--- a/src/main/java/com/alipay/oceanbase/hbase/util/OHBufferedMutatorImpl.java
+++ b/src/main/java/com/alipay/oceanbase/hbase/util/OHBufferedMutatorImpl.java
@@ -312,7 +312,7 @@ public void disableWriteBufferPeriodicFlush() {
     }
 
     @Override
-    public void close() throws IOException {
+    public synchronized void close() throws IOException {
         if (closed) {
             return;
         }