[undertow-dev] SSE close task

Hi, I'm playing with the SSE handler and I can't figure how the close task is working. I thought the close task would be invoked when the client closes the connection but it doesn't seem to be the case. I slightly modified the example code to register a close task when a connection is initiated, here's the code : ServerSentEventConnectionCallback callback = new ServerSentEventConnectionCallback() { @Override public void connected(ServerSentEventConnection connection, String lastEventId) { System.out.println("adding close task on connection..."); connection.addCloseTask(channel -> System.out.println("goodbye cruel world...")); } }; final ServerSentEventHandler sseHandler = Handlers.serverSentEvents(callback); It appears to me that the close task is only invoked when the server stops, but now when the client closes. Is it the expected behavior ? If so, is there any other way to be notified of a client disconnection ? Thanks a lot. Nel