diff --git a/mode/core/src/main/java/org/apache/shardingsphere/mode/metadata/MetaDataContextManager.java b/mode/core/src/main/java/org/apache/shardingsphere/mode/metadata/MetaDataContextManager.java
index a01c303fd4a98..5e486c9e2c750 100644
--- a/mode/core/src/main/java/org/apache/shardingsphere/mode/metadata/MetaDataContextManager.java
+++ b/mode/core/src/main/java/org/apache/shardingsphere/mode/metadata/MetaDataContextManager.java
@@ -42,7 +42,6 @@
 import java.sql.SQLException;
 import java.util.Collection;
 import java.util.Map;
-import java.util.concurrent.atomic.AtomicReference;
 
 /**
  * Meta data context manager..