Thanks Amos - we have heap dumps but unfortunately we could not share with the 
wider community as they're taken from a customer production environment. 
However, we can send on information taken from the heap dump - like output from 
pflags/pstack/etc. Would this be sufficient to investigate the issue?

Thanks and regards,
Justin

-----Original Message-----
From: Amos Jeffries [mailto:[email protected]] 
Sent: Sunday, May 06, 2012 7:16 AM
To: [email protected]
Subject: Re: [squid-users] Squid Restarting

On 4/05/2012 9:59 p.m., Justin Lawler wrote:
> Hi,
>
> We're running squid 3.1.19 - and have seen it restarting from the logs, just 
> after the below error:
>
> 2012/04/19 12:12:28| assertion failed: forward.cc:496: "server_fd == fd"
> 2012/04/19 12:12:59| Starting Squid Cache version 3.1.19 for 
> sparc-sun-solaris2.10...
>
> Is this a known issue? any workaround?

Seems to be new and a bit strange. Squid opens one connection to the server to 
fetch content sometime later a connection was closed, but not the one which was 
opened to begin with.

Do you have a core dump or stack trace available to identify what the fd and 
server_fd values actually were during the crash?

>
> It's been in production for 6 weeks now, and have only seen it once, but we 
> need to have an answer for the customer. We're worried it'll be more 
> frequently as traffic goes up.

Being the first report over a month after the release, it would seem to be very 
rare.

Amos
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