diff --git a/examples/kv.cpp b/examples/kv.cpp
index 581ff7f..a14e8a6 100644
--- a/examples/kv.cpp
+++ b/examples/kv.cpp
@@ -74,7 +74,7 @@ TMessageHolder<TLogEntry> TKv::Prepare(TMessageHolder<TCommandRequest> command)
 }
 
 template<typename TPoller, typename TSocket>
-NNet::TFuture<void> Client(TPoller& poller, TSocket socket) {
+NNet::TFuture<void> Client(TPoller& poller, TSocket socket, uint32_t flags) {
     using TFileHandle = typename TPoller::TFileHandle;
     TFileHandle input{0, poller}; // stdin
     co_await socket.Connect();
@@ -112,11 +112,14 @@ NNet::TFuture<void> Client(TPoller& poller, TSocket socket) {
                 auto key = strtok(nullptr, sep);
                 auto size = strlen(key);
                 auto mes = NewHoldedMessage<TReadKv>(sizeof(TReadKv) + size);
+                mes->Flags = flags;
                 mes->KeySize = size;
                 memcpy(mes->Data, key, size);
                 req = mes;
             } else if (!strcmp(prefix, "list")) {
-                req = NewHoldedMessage<TReadKv>(sizeof(TReadKv));
+                auto mes = NewHoldedMessage<TReadKv>(sizeof(TReadKv));
+                mes->Flags = flags;
+                req = mes;
             } else if (!strcmp(prefix, "del")) {
                 auto key = strtok(nullptr, sep);
                 auto size = strlen(key);
@@ -145,7 +148,7 @@ NNet::TFuture<void> Client(TPoller& poller, TSocket socket) {
 }
 
 void usage(const char* prog) {
-    std::cerr << prog << "--client|--server --id myid --node ip:port:id [--node ip:port:id ...] [--persist]" << "\n";
+    std::cerr << prog << "--client|--server --id myid --node ip:port:id [--node ip:port:id ...] [--persist] [--stale] [--consistent]" << "\n";
     exit(0);
 }
 
@@ -157,6 +160,7 @@ int main(int argc, char** argv) {
     uint32_t id = 0;
     bool server = false;
     bool persist = false;
+    uint32_t flags = 0;
     for (int i = 1; i < argc; i++) {
         if (!strcmp(argv[i], "--server")) {
             server = true;
@@ -167,6 +171,10 @@ int main(int argc, char** argv) {
             id = atoi(argv[++i]);
         } else if (!strcmp(argv[i], "--persist")) {
             persist = true;
+        } else if (!strcmp(argv[i], "--stale")) {
+            flags |= TCommandRequest::EStale;
+        } else if (!strcmp(argv[i], "--consistent")) {
+            flags |= TCommandRequest::EConsistent;
         } else if (!strcmp(argv[i], "--help")) {
             usage(argv[0]);
         }
@@ -212,7 +220,7 @@ int main(int argc, char** argv) {
         NNet::TAddress addr{hosts[0].Address, hosts[0].Port};
         NNet::TSocket socket(std::move(addr), loop.Poller());
 
-        auto h = Client(loop.Poller(), std::move(socket));
+        auto h = Client(loop.Poller(), std::move(socket), flags);
         while (!h.done()) {
             loop.Step();
         }
diff --git a/src/server.cpp b/src/server.cpp
index c79307b..d1c16f9 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -122,7 +122,7 @@ NNet::TVoidTask TRaftServer<TSocket>::InboundConnection(TSocket socket) {
         Nodes.insert(client);
         while (true) {
             auto mes = co_await TMessageReader(client->Sock()).Read();
-            // client request 
+            // client request
             if (auto maybeCommandRequest = mes.template Maybe<TCommandRequest>()) {
                 RequestProcessor->OnCommandRequest(std::move(maybeCommandRequest.Cast()), client);
             } else if (auto maybeCommandResponse = mes.template Maybe<TCommandResponse>()) {
@@ -170,6 +170,9 @@ NNet::TVoidTask TRaftServer<TSocket>::OutboundServe(std::shared_ptr<TNode<TSocke
     while (true) {
         bool error = false;
         try {
+            if (!node->IsConnected()) {
+                throw std::runtime_error("Not connected");
+            }
             auto mes = co_await TMessageReader(node->Sock()).Read();
             if (auto maybeCommandResponse = mes.template Maybe<TCommandResponse>()) {
                 RequestProcessor->OnCommandResponse(std::move(maybeCommandResponse.Cast()));