Update indexnode state to unhealthy before stopping (#12744)

Signed-off-by: NCongqi Xia <congqi.xia@zilliz.com>

internal/indexnode/indexnode.go

@@ -215,6 +215,9 @@ func (i *IndexNode) Start() error {
 
 // Stop closes the server.
 func (i *IndexNode) Stop() error {
+	// https://github.com/milvus-io/milvus/issues/12282
+	i.UpdateStateCode(internalpb.StateCode_Abnormal)
+
 	i.loopCancel()
 	if i.sched != nil {
 		i.sched.Close()
@@ -224,9 +227,6 @@ func (i *IndexNode) Stop() error {
 	}
 	i.session.Revoke(time.Second)
 
-	// https://github.com/milvus-io/milvus/issues/12282
-	i.UpdateStateCode(internalpb.StateCode_Abnormal)
-
 	log.Debug("Index node stopped.")
 	return nil
 }