Clients crashing a Netty Server using LengthFieldBasedFrameDecoder

[Christian Migowski]

Hi,


On Fri, Oct 16, 2009 at 1:10 PM, phi6 <phidinh6 at gmail.com> wrote:
>
>
> Thanks for that Christian, so I understand FrameDecoder is one per channel
> as specified in the annotation, so why am I getting this issue?

Netty doesn't enforce that there is one per Channel, it is up to you!
I guess your server setup looks something like this:

	ServerBootstrap bootstrap = new ServerBootstrap(factory);

	ChannelPipeline pipeline = bootstrap.getPipeline();
	pipeline.addLast("handler", new Handler());
...
	bootstrap.bind(new InetSocketAddress(...));


but this is not correct, it should be something like

        ServerBootstrap bootstrap  = new ServerBootstrap(factory);
        bootstrap.setPipelineFactory(new ServerPipelineFactory());
...
        bootstrap.bind(new InetSocketAddress(...));

where ServerPipelneFactory is something like

   class ServerPipelineFactory implements ChannelPipelineFactory {
        public ChannelPipeline getPipeline() throws Exception {
            ChannelPipeline pipeline = Channels.pipeline();
            pipeline.addLast("handler", new Handler());
            return pipeline;
        }
    }

That way, each time the server accepts a new channel, it gets a new
pipeline with a new Handler instance.

I think it is pretty good covered in the user guide, if you haven't
yet, you should definitivly read it!

hth,
regards,
christian!




> Could you explain the following a bit more:
>
>
> christian wrote:
>>
>> So you need to use bootstrap.setPipelineFactory() instead of getting
>> the default pipeline via bootstrap.getPipeline();
>>
>
> Many thanks!
>
> --
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