diff --git a/source/util/src/thash.c b/source/util/src/thash.c
index 8ae0a33f0f..89fc446da9 100644
--- a/source/util/src/thash.c
+++ b/source/util/src/thash.c
@@ -774,8 +774,11 @@ static void *taosHashReleaseNode(SHashObj *pHashObj, void *p, int *slot) {
     if (pOld->refCount <=0) {
       if (prevNode) {
         prevNode->next = pOld->next;
+        ASSERT(prevNode->next != prevNode);
       } else {
         pe->next = pOld->next;
+        SHashNode* x = pe->next;
+        ASSERT(x->next != x);
       }
 
       pe->num--;