diff --git a/core/src/main/java/org/apache/iceberg/util/LockManagers.java b/core/src/main/java/org/apache/iceberg/util/LockManagers.java
index c4220fe08230..96622cb57f83 100644
--- a/core/src/main/java/org/apache/iceberg/util/LockManagers.java
+++ b/core/src/main/java/org/apache/iceberg/util/LockManagers.java
@@ -18,9 +18,11 @@
  */
 package org.apache.iceberg.util;
 
+import java.util.List;
 import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.ScheduledThreadPoolExecutor;