Bug with DelimiterBasedFrameDecoder + Delimiters.nulDelimiter() or I am doing it wrong?

[NicolasDesy]

Hello all,

First of all, I'm quite new to Netty.  I have used to create a small adobe
policy file server and that's about it.

I'm currently working on an app based on master/slaves model.  I decided to
use netty for the communication between the master and the slaves.   

I have currently the following pipelineFactory on the master :

public ChannelPipeline getPipeline() {
        ChannelPipeline pipeline = Channels.pipeline();
        pipeline.addLast("decoder",
                new DelimiterBasedFrameDecoder(1024,
Delimiters.nulDelimiter()));
        pipeline.addLast("handler",
                new MasterHandler());
        return pipeline;
    }


On the client side, I send a version request to the server to be sure the
master and the slave are using the same build.  The request consist of 5
byte.  An integer which represents the command ID and the a null(0) byte.

I looked a little bit a the source and it seems like the decoder considers
that every single messages contain a null byte because it invokes the
unfoldAndFireMessageReceived() every time it received a "messageReceived"
event.  Which result in my handler receiving the "messageReceived" event
everytime even if the current message has not been fully received yet.


I changed my code to use a custom delimiter instead of
Delimiters.nulDelimiter() and now it works fine.

Is it a bug or I am doing something wrong?

Thanks in advance,
Nicolas
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