diff --git a/source/dnode/vnode/src/tq/tqSink.c b/source/dnode/vnode/src/tq/tqSink.c
index f690b9b277..25c2f32307 100644
--- a/source/dnode/vnode/src/tq/tqSink.c
+++ b/source/dnode/vnode/src/tq/tqSink.c
@@ -485,6 +485,7 @@ SVCreateTbReq* buildAutoCreateTableReq(const char* stbFullName, int64_t suid, in
 
 int32_t doPutIntoCache(SSHashObj* pSinkTableMap, STableSinkInfo* pTableSinkInfo, uint64_t groupId, const char* id) {
   if (tSimpleHashGetSize(pSinkTableMap) > MAX_CACHE_TABLE_INFO_NUM) {
+    taosMemoryFreeClear(pTableSinkInfo);  // too many items, failed to cache it
     return TSDB_CODE_FAILED;
   }