PollSelectorImpl's FD leak for asyncServlet

AsyncServlet doGet() like this:

protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException

{ resp.setContentType("text/html;charset=UTF-8"); AsyncContext ctx = req.startAsync(); new Thread(new Executor(ctx)).start(); }

public class Executor implements Runnable {
private AsyncContext ctx = null;

public Executor(AsyncContext ctx)

{ this.ctx = ctx; }

public void run() {
try

{ char[] data = new char[1024 * 1024 * 1]; PrintWriter out = ctx.getResponse().getWriter(); out.write(data); out.flush(); ctx.complete(); }

catch (Exception e)

{ e.printStackTrace(); }

}
do request this Servlet some times , run linux cmd :
lsof -p [JAVAPID]|grep pipe|wc -l
this number increases by two every one request,but never decrease! when this number up to OS's open file limit everything is not OK.