diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/hdfs/HDFSFileReader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/hdfs/HDFSFileReader.java
index 71c1d0146..26e769d6a 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/hdfs/HDFSFileReader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/hdfs/HDFSFileReader.java
@@ -23,7 +23,11 @@
 import java.util.List;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.*;
+import org.apache.hadoop.fs.FileChecksum;
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.RemoteIterator;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hugegraph.loader.constant.Constants;
 import org.apache.hugegraph.loader.exception.LoadException;