diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index 7047461ca8..f4ee0b98b7 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -297,6 +297,7 @@ int32_t tAppendDataToInputQueue(SStreamTask* pTask, SStreamQueueItem* pItem) {
     if ((pTask->taskLevel == TASK_LEVEL__SOURCE) && total > STREAM_TASK_INPUT_QUEUEU_CAPACITY) {
       qError("s-task:%s input queue is full, capacity:%d, abort", pTask->id.idStr, STREAM_TASK_INPUT_QUEUEU_CAPACITY);
       streamDataSubmitDestroy(pSubmitBlock);
+      taosFreeQitem(pSubmitBlock);
       return -1;
     }