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From "Brian Parkinson" <pa...@ecobee.com>
Subject Problem with mina hanging?
Date Fri, 22 May 2009 18:44:25 GMT

Hoping someone out there can help me, or at least point me in the right

I have a server built on top of mina - this communicates over HTTP and
HTTPS with a number of home thermostats (wifi enabled). It's all working
well, but I have a problem where the server locks up after about a week
of operation.

The server opens HTTP on port 8088, and HTTPs on port 8089. When the
server locks up, it appears that no messages are accepted on either port
(?) which seems weird. I'm still trying to nail this down further, but
that's about all I know right now.

I am running a somewhat older (pre-release) version of mina - it's
mina-core-2.0.0M1.jar. I recall that I built this from maven, but this
is a long while ago - like a year.

So, a bit of a vague question - does anyone recall that there may be a
deadlock in the mina code?

Any help is appreciated - it's so far been tough to debug, as it takes
about a week to manifest itself, and then when it does, it's a bit late
to get some stats and/or thread dumps. I don't think I'm running out of
file descriptors (I increased this value) but this seems to be resource
exhaustion of some kind. It's not an Out of Memory error I'm pretty
sure. There are no errors or exceptions in the logs; the server just
stops dead.

Any ideas, hints, advice really appreciated - I'm so far stumped.

I can certainly upgrade to the latest version of mina.


// Create an acceptor
NioSocketAcceptor acceptor = new NioSocketAcceptor();
DefaultIoFilterChainBuilder chain = acceptor.getFilterChain();

// Create a service configuration
chain.addLast("protocolFilter", new ProtocolCodecFilter(new
    Log.info(Server.class, "start", "Adding SSL filter.");

    SslFilter sslFilter = new
    chain.addFirst("sslFilter", sslFilter);
// Add in the custom filter which manages session information within the
// Add to the front of the chain, as we trap everything we need to here.
chain.addFirst("myFilter", new ServerFilter(sslEnabled));
// Set up the local address.
acceptor.setLocalAddress(new InetSocketAddress(port));
// Create the server handler and bind id to the acceptor.
RequestHandler handler = new RequestHandler(sslEnabled);

--- x8 snip

Brian Parkinson  parki@ecobee.com
Senior Software Architect
T 416.987.1049   C 416.725.2548  F 866.592.7344
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