As per ServerSocket(int port, int backlog), backlog indicates maximum length of the queue.
I created a simple server socket, with backlog as 1 using following code ServerSocket serverSocket = new ServerSocket(8001, 1); and my expectation was that when I will try to connect to this server with more than 1 client then I will get connection refused exception.
But when I tried to connect with this server from more than 1 client then I was able to connect even with 3 client in parallel and all were able to communicate with the server.
Am I missing something?
The backlog parameter can be adjusted up or down by the platform. The actual minimum backlog was initially 5 in BSD 4.3 and it is now more like 50 or even 500 on some platforms. There is no API to determine the actual value used.