Re: [Quickfixj-users] Is anybody seeing dropped incoming SSL messages?

[Toli K. <to...@ma...>]

In the spirit of answering my own questions, I have figured out my
problem - it was a "user error" of sorts.
Turns out I had a deadlock: since this was a quick-and-dirty sample
app, i was stupid to send a MarketDataRequest from inside the
onLogon() method. As a result, i had a lock on the DataDictionary and
was waiting on SocketIoProcessor (mina's SSL processor) while the
SocketIoProcessor was receiving a new message and was in turn waiting
on the DataDictionary.

So rest assured, SSL (if used correctly) does not drop any incoming messages.

Here's a corollary question: it's obvious that sending messages out in
onXXX callbacks can lead to deadlocks. Any advice/best practices on
how to handle that situation, aside from handing work out to other
threads/runnables?

thanks!

(stack dump with deadlock attached for the curious).

On 6/4/07, Toli Kuznets <to...@ma...> wrote:
> Hi,
>
> I'm using QFJ to connect to a broker via SSL.
>
> Every once in a while, i get in a situation where the underlying MINA
> layer is seeing incoming FIX messages, but they don't seem to ever
> make their way up to the application layer.
> Connecting to the same broker without SSL, i'm seeing the same exact
> incoming messages, but they don't ever get dropped.
>
> For example, during connection in the Mina output i'm seeing a Logon
> (35=A) followed by a Trading Session Status (35=h).
> The Logon comes through, but every once in a while the
> TradingSessionStatus doesn't.
> The broker logs shows them sending me a heartbeat and a test request,
> but i never see that (even in Mina layer) so eventually i'm timed out
> and disconnected.
>
> Is it possible that there's some race condition in the SSL decoding
> code? i can't seem to trace where the entrypoint from Mina into QFJ
> code is.
>
> The log with QFJ and Mina messages attached.
>
> --
> Toli Kuznets
> http://www.marketcetera.com: Open-Source Trading Platform
> download.run.trade.
>
>


-- 
Toli Kuznets
http://www.marketcetera.com: Open-Source Trading Platform
download.run.trade.