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From Julien Vermillard <>
Subject Re: [mina] Upgrading from Netty 2.1 to Mina
Date Wed, 14 Sep 2005 14:42:20 GMT
Le mercredi 14 septembre 2005 à 09:51 -0400, Oscar Herrera a écrit :
> Hello everybody. Actually starting this year we decided to use Netty
> to support a server we are currently building, about eight months
> later when we were building the first application to run into this
> server we realized we are having problems with the message ordering, I
> mean, code is written in a sequential order, but anyway events are
> being triggered in a random order. Analyzing the issue we realized the
> problem is related to the threading pool Netty uses, actually it is
> something like many events being triggered in a synchronous way, but
> when they get to Netty it might use all available resources to send
> all the answers for all the events by different channels (network
> connections), so this is causing the client application to receive the
> messages in the wrong order. I changed the number of IoThreads and
> this solved the issue, but at the same time this reduced the
> performance of the server as I think it was expected. 
> So basically we have 2 approaches to solve this issue: modify Netty
> classes trying to link each client application with one channel (with
> all the considerations this might lead), or upgrading Netty by Mina.
> So here is where my question arises, have any one have any experience
> like this or know if the latest version of Mina might solve this
> issue?. Actually the answer to this question is very important because
> of the time each approach might take, so we’d like to have some
> confidence about the way we decide to proceed to give a solution to
> this issue.
> Thank you so much for your help,

Hello, I think you should try to use the netty2 codec for Mina 0.7 it
never procduced the behaviour you are reporting on my application.


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