http server disconnects tcp connection after processing a request
The HTTP server after returning a response for a query immediately disconnects tcp connection with an asking client. It means that clients have to establish tcp connection for each HTTP query (send SYN and waits for SYN ACK), even when it wants to immediately ask the node again. It is good visible during hivemind synchronization process: although hivemind contains connections pools it is forced to reestablish tcp connection with each query ( what produces thousands of inactive connections which cannot be immediately cleaned by the system).