Why a “java.net.SocketException: Broken pipe” will occur?

Question

I wrote a simple socket programme, it works fine, but my friend use a port scanning tool, when it scan to the port I am using, it cash with \"java.net.SocketException: Broke

Answer 1

The reason of your problem may be here:

JavaDoc:

The maximum queue length for incoming connection indications (a request to connect) is set to 50. If a connection indication arrives when the queue is full, the connection is refused.

And you should increase "backlog" parameter of your ServerSocket, for example

int backlogSize = 50 ;
providerSocket = new ServerSocket(portNum, backlogSize);