diff --git a/meta/src/main/java/com/alibaba/otter/canal/meta/FileMixedMetaManager.java b/meta/src/main/java/com/alibaba/otter/canal/meta/FileMixedMetaManager.java
index 53d92701..0929f8c5 100644
--- a/meta/src/main/java/com/alibaba/otter/canal/meta/FileMixedMetaManager.java
+++ b/meta/src/main/java/com/alibaba/otter/canal/meta/FileMixedMetaManager.java
@@ -209,7 +209,11 @@ public class FileMixedMetaManager extends MemoryMetaManager implements CanalMeta
 
                 data.setClientDatas(clientDatas);
             }
-
+            //fixed issue https://github.com/alibaba/canal/issues/4312
+            //客户端数据为空时不覆盖文件内容 （适合单客户端）
+            if(data.getClientDatas().isEmpty()){
+                return;
+            }
             String json = JsonUtils.marshalToString(data);
             try {
                 FileUtils.writeStringToFile(dataFile, json);