diff --git a/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/execution/bulkinsert/RDDCustomColumnsSortPartitioner.java b/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/execution/bulkinsert/RDDCustomColumnsSortPartitioner.java
index b1cbe47a6..dc80498c7 100644
--- a/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/execution/bulkinsert/RDDCustomColumnsSortPartitioner.java
+++ b/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/execution/bulkinsert/RDDCustomColumnsSortPartitioner.java
@@ -68,7 +68,7 @@ public class RDDCustomColumnsSortPartitioner<T extends HoodieRecordPayload>
           if (recordValue == null) {
             return StringUtils.EMPTY_STRING;
           } else {
-            return StringUtils.objToString(record);
+            return StringUtils.objToString(recordValue);
           }
         },
         true, outputSparkPartitions);