diff --git a/source/libs/executor/src/groupoperator.c b/source/libs/executor/src/groupoperator.c
index 938134c167..528b39c17f 100644
--- a/source/libs/executor/src/groupoperator.c
+++ b/source/libs/executor/src/groupoperator.c
@@ -727,7 +727,7 @@ static void destroyPartitionOperatorInfo(void* param, int32_t numOfOutput) {
   taosMemoryFree(pInfo->columnOffset);
 
   cleanupExprSupp(&pInfo->scalarSup);
-  
+  clearDiskbasedBuf(pInfo->pBuf);
   taosMemoryFreeClear(param);
 }