Hi,
The number of concurrent connections is limited by the browser:
http://stackoverflow.com/questions/561046/how-many-concurrent-ajax-xmlhttprequest-requests-are-allowed-in-popular-browse
Best Regards,
Ari Luoma
On Mon, Jun 29, 2015 at 12:08 PM, 许明 wrote:
> Hi,
>
> I am trying to bench async servlet, tomcat7 and tomcat8, now it's seems I
> can only start 2 request from a end-point.
>
>
> I make a simple tool, start 100 request same time, each request has own
> session, and write a simple async servlet, which pasted in the bottom of
> this mail.
>
>
> It's the result:
>
>
> 06-29 16:28:52 622 INFO (Test.java:35)- test serve 1
> 06-29 16:28:52 622 INFO (Test.java:35)- test serve 2
> 06-29 16:29:02 633 DEBUG (Test.java:54)- timout and print
> 06-29 16:29:02 637 DEBUG (Test.java:54)- timout and print
> 06-29 16:29:02 642 INFO (Test.java:35)- test serve 3
> 06-29 16:29:02 677 INFO (Test.java:35)- test serve 4
> 06-29 16:29:12 647 DEBUG (Test.java:54)- timout and print
> 06-29 16:29:12 650 INFO (Test.java:35)- test serve 5
> 06-29 16:29:12 682 INFO (Test.java:35)- test serve 6
> ....
>
>
> i have test this on tomcat7 and tomcat8 in windows and linux(ubuntu), and
> test it in browser manually.
>
>
> Best Regards
>
>
> ===================
> my Test servlet:
> ===================
>
>
> package com.botao.im;
>
>
> import java.io.IOException;
> import java.io.PrintWriter;
> import java.util.concurrent.Executors;
> import java.util.concurrent.ScheduledExecutorService;
> import java.util.concurrent.TimeUnit;
>
>
> import javax.servlet.AsyncContext;
> import javax.servlet.ServletException;
> import javax.servlet.annotation.WebServlet;
> import javax.servlet.http.HttpServlet;
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.http.HttpServletResponse;
>
>
> import org.apache.log4j.Logger;
>
>
> /**
> * Servlet implementation class Test
> */
> @WebServlet(asyncSupported = true, name = "test", urlPatterns = { "/test"
> })
> public class Test extends HttpServlet {
> private static final long serialVersionUID = 1L;
>
>
> private static Logger logger = Logger.getLogger(Test.class);
>
> private static ScheduledExecutorService es =
> Executors.newSingleThreadScheduledExecutor();
>
> private static int counter = 0;
>
> protected void doGet(HttpServletRequest request, final
> HttpServletResponse response) throws ServletException, IOException {
>
> logger.info("test serve " + (++counter ));
> final AsyncContext context = request.startAsync();
>
>
> context.start(new Runnable() {
>
> @Override
> public void run() {
> context.setTimeout(1000000);
> es.schedule(new Runnable(){
>
>
> @Override
> public void run() {
>
> response.setContentType("text/plain");
> PrintWriter out;
> try {
> out =
> response.getWriter();
>
> out.print("hello");
>
> out.flush();
>
> context.complete();
>
> logger.debug("timout and print");
> } catch
> (IOException e) {
> }
>
> }
>
> }, 10, TimeUnit.SECONDS);
> }
> });
>
> }
>
>
>
>
> }
