diff --git a/server/masterserver/gsmgr.cc b/server/masterserver/gsmgr.cc
index 494343a..19f2caf 100644
--- a/server/masterserver/gsmgr.cc
+++ b/server/masterserver/gsmgr.cc
@@ -71,10 +71,16 @@ void GSMgr::_SS_WSP_RequestTargetServer(f8::MsgHdr* hdr, const ss::SS_WSP_Reques
             a8::XObject request;
             request.ReadFromUrlQueryString(msg.query_str());
             if (request.HasKey("server_id")) {
-                auto node = GetNodeByInstanceId(request.At("server_id")->AsXValue());
+                node = GetNodeByInstanceId(request.At("server_id")->AsXValue());
             } else {
                 node = nullptr;
             }
+            if (!node) {
+                respmsg.set_error_code(1);
+                respmsg.set_error_msg("cant alloc node1");
+                GGListener::Instance()->SendMsg(hdr->socket_handle, respmsg);
+                return;
+            }
         }
 #endif
         if (node) {