Fix node vanishing bug (merge from main #16224) (#16325)

Author: alexvru

ydb/core/blobstorage/nodewarden/distconf.h

@@ -227,6 +227,7 @@ namespace NKikimr::NStorage {
         // pending event queue
         std::deque<TAutoPtr<IEventHandle>> PendingEvents;
         std::vector<ui32> NodeIds;
+        THashSet<ui32> NodeIdsSet;
         TNodeIdentifier SelfNode;
 
         // scatter tasks

ydb/core/blobstorage/nodewarden/distconf_binding.cpp

@@ -58,6 +58,7 @@ namespace NKikimr::NStorage {
         // issue updates
         NodeIds = std::move(nodeIds);
         BindQueue.Update(NodeIds);
+        NodeIdsSet = {NodeIds.begin(), NodeIds.end()};
     }
 
     void TDistributedConfigKeeper::IssueNextBindRequest() {
@@ -323,7 +324,8 @@ namespace NKikimr::NStorage {
         const auto [it, inserted] = AllBoundNodes.try_emplace(std::move(nodeId));
         TIndirectBoundNode& node = it->second;
 
-        if (inserted) { // disable this node from target binding set, this is the first mention of this node
+        if (inserted && NodeIdsSet.contains(it->first.NodeId())) {
+            // disable this node from target binding set, this is the first mention of this node
             BindQueue.Disable(it->first.NodeId());
         }
 
@@ -363,7 +365,9 @@ namespace NKikimr::NStorage {
 
         if (node.Refs.empty()) {
             AllBoundNodes.erase(it);
-            BindQueue.Enable(nodeId.NodeId());
+            if (NodeIdsSet.contains(nodeId.NodeId())) {
+                BindQueue.Enable(nodeId.NodeId());
+            }
             if (msg) {
                 nodeId.Serialize(msg->Record.AddDeletedBoundNodeIds());
             }