Description Jan Prach 2010-11-30 13:50:29 EST

Build Identifier: 7.2.1.v20101111

Hi,

HTTP/1.0 requests leak SelectChannelEndPoint instances! The instances of this class won't get freed, not even after days. Each instance keeps a lot of references within JVM and also system file descriptors / sockets. Java heap and file descriptors disappear really quickly - within minutes if we would put it into production!

I can provide further information. The investigation generated lots of tcpdumps, straces, heapdumps and other stuff :-)


Test environment(s):
  * CentOS with 2.6.18-194.3.1.el5 kernel
  * Ubuntu 10.04 with default 2.6.32 and 2.6.35-22-server kernels
  * JVM 1.6.0_20 and 1_6_22
  * jetty 7.1.6, 7.2.1, 8.0.0.M2 - all of them
  * default settings of all the components (just file descriptor limit increased)



Requests:
POST /helloworld HTTP/1.0
Content-Type: application/json
Content-Length: 105
User-Agent: Syncer/5.00 (unknown)
Host: some.host.com
Connection: Keep-Alive
Pragma: no-cache

{"some json data here": "foo"}



Simplified program that leaks is the simplest hello world as follows:
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.AbstractHandler;

public class Foo {
  public static class HelloHandler extends AbstractHandler {
    @Override
    public void handle(final String target, final Request baseRequest,
        final HttpServletRequest request, final HttpServletResponse response)
        throws IOException, ServletException {
      response.setStatus(HttpServletResponse.SC_OK);
      baseRequest.setHandled(true);
      response.getWriter().println("Hello World");
    }
  }

  public static void main(final String[] args) throws Exception {
    final Server server = new Server(8088);
    server.setHandler(new HelloHandler());
    server.start();
    server.join();
  }
}


Reproducible: Always