diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/distribute/worker/job/AbstractUnassignedScanJob.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/distribute/worker/job/AbstractUnassignedScanJob.java
index 9be9ee5cdbf303b..4819a0419c9d8a6 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/distribute/worker/job/AbstractUnassignedScanJob.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/distribute/worker/job/AbstractUnassignedScanJob.java
@@ -190,7 +190,7 @@ protected int degreeOfParallelism(int maxParallel) {
             return 1;
         }
         if (fragment.queryCacheParam != null) {
-            // backend need use one parallel for one tablet to look up tablet query cache
+            // backend need use one instance for one tablet to look up tablet query cache
             return maxParallel;
         }
         if (scanNodes.size() == 1 && scanNodes.get(0) instanceof OlapScanNode) {