Shutdown a Nodejs HTTP server gracefully by doing the following:
- Close the listening socket to prevent new connections
- Close all idle keep-alive sockets to prevent new requests during shutdown
- Wait for all in-flight requests to finish before closing their sockets.
Other solutions might just use
server.close which only terminates the listening socket and waits for other sockets to close - which is incomplete since keep-alive sockets can still make requests. Or, they may use
ref()/unref() to simply cause Nodejs to terminate if the sockets are idle - which doesn't help if you have other things to shutdown after the server shutsdown.
http-shutdown is a complete solution. It uses idle indicators combined with an active socket list to safely, and gracefully, close all sockets. It does not use
ref()/unref() but, instead, actively closes connections as they finish meaning that socket 'close' events still work correctly since the sockets are actually closing - you're not just
unrefing and forgetting about them.
$ npm install http-shutdown
There are currently two ways to use this library. The first is explicit wrapping of the
// Create the http servervar server =;// Wrap the server object with additional functionality.// This should be done immediately after server construction, or before you start listening.// Additional functionailiy needs to be added for http server events to properly shutdown.server = server;// Listen on a port and start taking requests.server;// Sometime later... shutdown the server.server;
The second is implicitly adding prototype functionality to the
// .extend adds a .withShutdown prototype method to the Server object;var server =; // <-- Easy to chain. Returns the Server object// Sometime later, shutdown the server.server;