lighttpd failing to accept new connections ( connection reset )

[Steven Hartland]

----- Original Message ----- 
From: "Robert Watson" <rwatson at FreeBSD.org>
> The connections getting reset without application notification is a classic 
> symptom of a full listen queue.  A couple of questions:

Yep thats what I thought.

> (1) What FreeBSD version?

7.0-RELEASE-p2 (amd64)

> (2) Are you using accept filters?

The modules there but not loaded, so no.

> (3) If possibly, are you able to instrument lighthttpd so that you can trigger
>     it to query SO_LISTENQLIMIT, SO_LISTENQLEN, and SO_LISTENINCQLEN on the
>     listen socket once things have gone wrong?  The respectively (and perhaps
>     obviously) querye the current administrative limit on queue depth, the
>     number queue depth on completed connections, and the current queue depth
>     on incomplete connections.  The last of these will only be used with
>     accept filters on recent FreeBSD network stacks (since the syncache was
>     added).
> 
> Hopefully doing (3) will allow us to try to determine whether it's indeed the 
> case that somehow the listen queue or event handling has gotten "wedged" in 
> some way.

This should be possible, I'll have a look, assuming the kgdb stuff doesn't
turn up the required results.
 
    Regards
    Steve


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