diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
index 67d2ca78ee596cafee038175e666e86439523d5a..d682fa9cc58339e6e8d9a926a50e08d2cd9d42d2 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
@@ -273,7 +273,17 @@ int32_t vmProcessAlterVnodeReq(SVnodeMgmt *pMgmt, SRpcMsg *pMsg) {
   }
 
   int32_t vgId = alterReq.vgId;
-  dInfo("vgId:%d, start to alter vnode replica", alterReq.vgId);
+  dInfo("vgId:%d, start to alter vnode, replica:%d selfIndex:%d strict:%d", alterReq.vgId, alterReq.replica,
+        alterReq.selfIndex, alterReq.strict);
+  for (int32_t i = 0; i < alterReq.replica; ++i) {
+    dInfo("vgId:%d, replica:%d ep:%s:%u", alterReq.vgId, i, alterReq.replicas[i].fqdn, alterReq.replicas[i].port);
+  }
+
+  if (alterReq.replica <= 0 || alterReq.selfIndex < 0 || alterReq.selfIndex >= alterReq.replica) {
+    terrno = TSDB_CODE_INVALID_MSG;
+    dError("vgId:%d, failed to alter replica since invalid msg", alterReq.vgId);
+    return -1;
+  }
 
   SVnodeObj *pVnode = vmAcquireVnode(pMgmt, vgId);
   if (pVnode == NULL) {
diff --git a/source/dnode/mnode/impl/src/mndVgroup.c b/source/dnode/mnode/impl/src/mndVgroup.c
index 11f5a9f12afe34ee468eef9d5afadae3435f30ba..839c870418d9f479a89bb89e904812bdc873e438 100644
--- a/source/dnode/mnode/impl/src/mndVgroup.c
+++ b/source/dnode/mnode/impl/src/mndVgroup.c
@@ -341,6 +341,7 @@ static void *mndBuildAlterVnodeReplicaReq(SMnode *pMnode, SDbObj *pDb, SVgObj *p
       alterReq.selfIndex = v;
     }
   }
+  alterReq.replica = pVgroup->replica;
 
   if (alterReq.selfIndex == -1) {
     terrno = TSDB_CODE_MND_APP_ERROR;