On Thursday, April 5, 2012 11:23:08 AM UTC-4, Ben Noordhuis wrote:
>
> On Thu, Apr 5, 2012 at 15:48, Paul Selden <[email protected]> wrote:
> > I'm using: https://github.com/mikeal/request/blob/master/forever.js as 
> an
> > agent in a project that uses a service-oriented-architecture (currently 
> over
> > HTTP) in order to maximize the chance that the connections are kept alive
> > (note, I'm not using the entire request module, just that agent).
> >
> > ...<snip>....
> > options.agent = new ForeverAgent({ minSockets: 100, maxSockets: 100});
> > var req = http.request(options, function (res) {
> > ...<snip>...
> > });
> >
> > req.setTimeout(timeout, function(){ req.abort(); });
> >
> > As more calls are made, it seems to "accumulate" the timeouts for the
> > underlying socket as it is being re-used and I eventually get this error:
> >
> > [2012-04-05 09:21:07.144] [ERROR] console - (node) warning: possible
> > EventEmitter memory leak detected. 11 listeners added. Use
> > emitter.setMaxListeners() to increase limit.
> > [2012-04-05 09:21:07.146] [ERROR] console - Trace:
> >     at Socket.<anonymous> (events.js:139:15)
> >     at Socket.once (events.js:160:8)
> >     at Socket.setTimeout (net.js:143:12)
> >     at ClientRequest.<anonymous> (http.js:1287:29)
> >     at ClientRequest.g (events.js:156:14)
> >     at ClientRequest.emit (events.js:88:20)
> >     at Array.0 (http.js:1273:9)
> >     at EventEmitter._tickCallback (node.js:192:40)
> >
> > Is this a bug with the forever agent, the http module, or something that 
> I
> > need to unbind myself after a request is finished?
>
> It's documented so it's not a bug. :-)
>
> When you add a callback, it gets registered as a listener for the
> 'timeout' event with EventEmitter.prototype.once(). If you keep
> registering listeners, you'll hit the max listeners limit.
>

Then is this something I can unbind manually if the timeout isn't hit 
during a particular request?

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