diff --git a/src/util/inc/hash.h b/src/util/inc/hash.h
index 6c4145810b9819e60a9cb979a8ab42795df3cf00..10b79bb9713cbcaf6d1d7158afda78c144b42ccc 100644
--- a/src/util/inc/hash.h
+++ b/src/util/inc/hash.h
@@ -36,7 +36,7 @@ typedef struct SHashNode {
   uint32_t          dataLen;     // length of data
   uint32_t          keyLen;      // length of the key
   int8_t            removed;     // flag to indicate removed
-  int8_t            count;       // reference count
+  int32_t           count;       // reference count
   char              data[];
 } SHashNode;
 
diff --git a/src/util/src/hash.c b/src/util/src/hash.c
index 28ba791c9cffec42ce5631933a6bf2ef187312db..b6696810c12371bb8269149d082ad6890ddc4dd4 100644
--- a/src/util/src/hash.c
+++ b/src/util/src/hash.c
@@ -119,7 +119,7 @@ static SHashNode *doCreateHashNode(const void *key, size_t keyLen, const void *p
 static FORCE_INLINE SHashNode *doUpdateHashNode(SHashObj *pHashObj, SHashEntry* pe, SHashNode* prev, SHashNode *pNode, SHashNode *pNewNode) {
   assert(pNode->keyLen == pNewNode->keyLen);
 
-  pNode->count--;
+  atomic_sub_fetch_32(&pNode->count, 1);
   if (prev != NULL) {
     prev->next = pNewNode;
   } else {
@@ -459,7 +459,7 @@ int32_t taosHashRemoveWithData(SHashObj *pHashObj, const void *key, size_t keyLe
   if (pNode) {
     code = 0;  // it is found
 
-    pNode->count--;
+    atomic_sub_fetch_32(&pNode->count, 1);
     pNode->removed = 1;
     if (pNode->count <= 0) {
       if (prevNode) {
@@ -809,7 +809,7 @@ static void *taosHashReleaseNode(SHashObj *pHashObj, void *p, int *slot) {
       pNode = pNode->next;
     }
 
-    pOld->count--;
+    atomic_sub_fetch_32(&pOld->count, 1);
     if (pOld->count <=0) {
       if (prevNode) {
         prevNode->next = pOld->next;
@@ -875,7 +875,7 @@ void *taosHashIterate(SHashObj *pHashObj, void *p) {
 
   if (pNode) {
     SHashEntry *pe = pHashObj->hashList[slot];
-    pNode->count++;
+    atomic_add_fetch_32(&pNode->count, 1);
     data = GET_HASH_NODE_DATA(pNode);
     if (pHashObj->type == HASH_ENTRY_LOCK) {
       taosWUnLockLatch(&pe->latch);