JSch session timeout limit

Question

I\'m using JSch 0.1.50 to set up a connection to the remote server for my CI Jenkins plugin. Let\'s assume I\'m trying to use here session.connect(60000); for t

Answer 1

If you check how the Util.createSocket is implemented, you will see that the timeout defines an upper limit of the connection only, not a lower limit, because the timeout is strangely not passed to an underlying Socket.

Those 20 seconds is probably an OS-level default limit.

To override it, try implementing the SocketFactory and attach it to the session using the Session.setSocketFactory.

In the factory use the Socket.connect(SocketAddress endpoint, int timeout).

Something like:

public class SocketFactoryWithTimeout implements SocketFactory {
  public Socket createSocket(String host, int port) throws IOException,
                                                           UnknownHostException
  {
    socket=new Socket();
    int timeout = 60000;
    socket.connect(new InetSocketAddress(host, port), timeout);
    return socket;
  }

  public InputStream getInputStream(Socket socket) throws IOException
  {
    return socket.getInputStream();
  }

  public OutputStream getOutputStream(Socket socket) throws IOException
  {
    return socket.getOutputStream();
  }
}