diff --git a/ams/server/src/main/java/com/netease/arctic/server/table/TableConfiguration.java b/ams/server/src/main/java/com/netease/arctic/server/table/TableConfiguration.java
index a81518aa99..122fa22f39 100644
--- a/ams/server/src/main/java/com/netease/arctic/server/table/TableConfiguration.java
+++ b/ams/server/src/main/java/com/netease/arctic/server/table/TableConfiguration.java
@@ -1,5 +1,6 @@
 package com.netease.arctic.server.table;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.google.common.base.Objects;
 import com.netease.arctic.server.optimizing.OptimizingConfig;
 import com.netease.arctic.table.TableProperties;
@@ -7,6 +8,7 @@
 
 import java.util.Map;
 
+@JsonIgnoreProperties(ignoreUnknown = true)
 public class TableConfiguration {
   private boolean expireSnapshotEnabled;
   private long snapshotTTLMinutes;
diff --git a/ams/server/src/test/java/TestFindDuplicateRecords.java b/ams/server/src/test/java/TestFindDuplicateRecords.java
new file mode 100644
index 0000000000..624d3d0187
--- /dev/null
+++ b/ams/server/src/test/java/TestFindDuplicateRecords.java
@@ -0,0 +1,106 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import com.netease.arctic.catalog.ArcticCatalog;
+import com.netease.arctic.catalog.CatalogLoader;
+import com.netease.arctic.io.DataTestHelpers;
+import com.netease.arctic.table.ArcticTable;
+import com.netease.arctic.table.TableIdentifier;
+import org.apache.iceberg.ContentFile;
+import org.apache.iceberg.DeleteFile;
+import org.apache.iceberg.FileFormat;
+import org.apache.iceberg.FileScanTask;
+import org.apache.iceberg.Table;
+import org.apache.iceberg.data.GenericRecord;
+import org.apache.iceberg.data.Record;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class TestFindDuplicateRecords {
+  private static final Logger LOG = LoggerFactory.getLogger(TestFindDuplicateRecords.class);
+  private final String thriftUrl;
+  private final String CID_COLUMN = "id";
+  private final String HID_COLUMN = "name";
+  
+  private final Object CID_VALUE = 2003;
+  private final Object HID_VALUE = "hhh";
+
+  public static void main(String[] args) throws IOException {
+    TestFindDuplicateRecords scan = new TestFindDuplicateRecords("thrift://localhost:1260");
+    scan.test(TableIdentifier.of("local_iceberg", "db", "user10"));
+  }
+
+  public TestFindDuplicateRecords(String thriftUrl) {
+    this.thriftUrl = thriftUrl;
+  }
+
+  public void test(TableIdentifier tableIdentifier) throws IOException {
+    ArcticTable arcticTable = loadTable(tableIdentifier);
+    Table table = arcticTable.asUnkeyedTable();
+    List<ContentFile<?>> relatedFiles = findRelatedFiles(table, table.currentSnapshot().snapshotId());
+
+    System.out.println("===== related data files =====");
+    relatedFiles.forEach(f -> System.out.println(f.path()));
+  }
+
+  public List<ContentFile<?>> findRelatedFiles(Table table, long snapshotId) throws IOException {
+    List<ContentFile<?>> files = new ArrayList<>();
+    for (FileScanTask task : table.newScan().useSnapshot(snapshotId).planFiles()) {
+      List<Record> records =
+          DataTestHelpers.readDataFile(FileFormat.PARQUET, table.schema(), task.file().path().toString());
+      for (Record record : records) {
+        if (equals((GenericRecord) record)) {
+          files.add(task.file());
+          break;
+        }
+      }
+    }
+    return files;
+  }
+  
+  public static void planFiles(Table table, long snapshotId) {
+    String file1 = "xxx";
+    String file2 = "yyy";
+    for (FileScanTask task : table.newScan().useSnapshot(snapshotId).planFiles()) {
+      String path = task.file().path().toString();
+      if (path.equals(file1) || path.equals(file2)) {
+        System.out.println("===== related data files =====");
+        System.out.println(path);
+        for (DeleteFile delete : task.deletes()) {
+          System.out.println(delete.path());
+        }
+      }
+    }
+  }
+  
+  private boolean equals(GenericRecord record) {
+    return record.getField(CID_COLUMN).equals(CID_VALUE) && record.getField(HID_COLUMN).equals(HID_VALUE);
+  }
+
+  private ArcticTable loadTable(TableIdentifier tableIdentifier) {
+    String catalogUrl = thriftUrl + "/" + tableIdentifier.getCatalog();
+
+    // 1.scan files
+    ArcticCatalog load = CatalogLoader.load(catalogUrl);
+    return load.loadTable(tableIdentifier);
+  }
+}