diff --git a/dora/core/server/master/src/main/java/alluxio/master/job/LoadSubTask.java b/dora/core/server/master/src/main/java/alluxio/master/job/LoadSubTask.java
index 834ab0e1ca4d..593f2b6fc111 100644
--- a/dora/core/server/master/src/main/java/alluxio/master/job/LoadSubTask.java
+++ b/dora/core/server/master/src/main/java/alluxio/master/job/LoadSubTask.java
@@ -106,10 +106,11 @@ public static LoadSubTask from(LoadFailure loadFailure, long virtualBlockSize) {
 
   @Override
   public String toString() {
+    WorkerInfo workerInfo = getWorkerInfo();
     return MoreObjects.toStringHelper(this)
         .add("UfsPath", getUfsPath())
-        .add("ShardingKey", mHashKey.asString())
-        .add("Worker", getWorkerInfo().getAddress().toString())
+        .add("ShardingKey", mHashKey == null ? null : mHashKey.asString())
+        .add("Worker", workerInfo == null ? null : workerInfo.getAddress().toString())
         .toString();
   }
 }