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From 凌晨 <lingc...@usertunnel.com>
Subject Re: Experiences with bulk connections
Date Tue, 24 Oct 2006 03:47:03 GMT
Dear Trustin,
I traced the stack traces then I found there were many connections closed 
normally, which could be my test clients' problems
and the 'Connection rest' as you mentioned to upgrade my hardware,the 
followed descriptions are about my hard&soft-ware
Linux version 2.6.9-22.ELsmp  (gcc version 3.4.4 20050721 (Red Hat 3.4.4-2))
JDK 1.5.6
MINA 1.0
1 Xeon
When I finished my test procedure which means I make the test clients closed 
then I traced there were no connections bound to my
server,when I restart my server then 'Address Already In Use' exception was 
thrown,by the command 'netstat' I found there are several
connections stuck in CLOSE_WAIT......
the reuseAddress and unbindAll were both enabled and definitely be invoked 
in my server...So...It's so wired,which has been troubling me until NOW
please help me out....
IoAcceptorConfig config = new SocketAcceptorConfig();
((SocketAcceptorConfig) config).setReuseAddress(true);
acceptor.bind(new InetSocketAddress(PORT), new ProtocolHandler(),config);
AND for every incoming connection
public void sessionCreated(IoSession session)
  if (session.getTransportType() == TransportType.SOCKET)
   ((SocketSessionConfig) session.getConfig()).setReuseAddress(true);
----- Original Message ----- 
From: "Trustin Lee" <trustin@gmail.com>
To: <mina-dev@directory.apache.org>
Sent: Tuesday, October 24, 2006 10:33 AM
Subject: Re: Experiences with bulk connections

> Hi James,
> On 10/20/06, 凌晨 <lingchen@usertunnel.com> wrote:
>> Just yesterday I did almost the same test.Established 1000 connections 
>> per
>> second and 20000 at all,every connetion sent small data package as soon 
>> as
>> connected to register itself to the
>> server(HashMap<String,Iosession>).During the whole procedure,many a 
>> former
>> connected IoSession stored in HashMap had been closed abnormally and
>> unexpectedly and there only no more than
>> 200 connections remained in HashMap at last.I have been revising  my 
>> codes
> Please give us a few stack traces you've got during the test.  If they are
> just regular SocketExceptions like 'connection reset', it's caused by your
> O/S or network device and this means we cannot fix it.  You will have to
> adjust your O/S parameter or upgrade your hardware.
> HTH,
> Trustin
> -- 
> what we call human nature is actually human habit
> --
> http://gleamynode.net/
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