dev@grizzly.java.net

Re: Strange behavior of Grizzly

From: Bongjae Chang <carryel_at_korea.com>
Date: Tue, 2 Jun 2009 22:03:53 +0900

Hi Minoru,

I saw your app curiously and I could reproduce your problem.

When I debugged your program, I could know that your problem was perhaps caused by duplicated socket binding.

I think that it is better that the client controller doesn't use a local address when it connects remote peer.

See the following:

In ConnectionManager.java
---
private ConnectorHandler createHandlerUDP(...) {
   ...
   try {
      //connectorHandler.connect(socketRemote, local, callbackHandler);
      connectorHandler.connect(socketRemote, callbackHandler);
   } ...
}
---

In my opinion, the server controller's socket which was already binded with a local address could have a problem if a client tried to bind own socket with the same address locally.

I could see that your program's server couldn't receive any packets though blocking DatagramSocket(UAC and UAS) sent a packet to the server controller successfully.

So I thought that maybe the server had a problem.

It is not certain. :-)

But, I hope that my proposed patch and my words help you.

Thanks!

--
Bongjae Chang


----- Original Message -----
From: "Minoru Nitta" <minoru.nitta_at_jp.fujitsu.com>
To: <dev_at_grizzly.dev.java.net>
Sent: Tuesday, June 02, 2009 5:28 PM
Subject: Strange behavior of Grizzly


> Salut,
>
>
>
> I have been encountering a strange behavior of grizzly, and I need help.
> I tested the enclosed program and it sometimes worked fine and it sometimes did
> not work well. When it works, it repeats sending requests and responses,
> but when it does not work well, it stops repeating.
>
> I have no idea where is the problem (my test program or grizzly).
> I tested it on grizzly version 1.9.12 to 1.9.16 and the result was same.
>
> Thanks.
>
> Minoru
>
>


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