Re: [squid-users] Squid 3.0 Segmentation Fault with ESI

Duncan Booth wrote:
> Amos Jeffries wrote:
>> Duncan Booth wrote:
>>> I'm trying to use Squid 3 with ESI enabled, and while it works fine
>>> for a few pages as soon as we put it under load it just crashes. I've
>>> tried a variety of squid 3.0 versions: from STABLE6 (which is the one
>>> we used on our development system) up to 3.0.STABLE13-20090212 and
>>> they all behave the same.
>>>
> <snip>
>> ESI is still very experimental. I'll look into this and see if I can
>> find a fix.
>>
>> Can you rebuild squid with --disable-optimizations please, and get a
>> trace from that build which indicates which of the inline functions
>> has failed?
>
> I did that, but before I post it I decided to try to track the problem
> down a bit more for myself.
>
> What is happening is that I set the backend server to add the
> Surrogate-Control header to everything in a specific folder. That
> included images and squid so far as I can tell doesn't seem to do any
> sanity checking such as Content-Type starting with text/. I pinned the
> issue down to a single specific image that crashes Squid reliably (as in
> I start squid and send a single request for that image and get the
> crash). The image in question (should anyone want to try to reproduce
> the problem) is at
> http://www.oxfam.org.uk/shop/content/ethicalcollection/images/EC_hub_buyagift3.jpg
>
>
> So my first order is to figure out how to get the Surrogate-Control
> header set only on HTML files (it's IIS so I'm not entirely sure how
> easy that will be) and then, with any luck, I'll be ok. Should I file a
> bug report for this (even if it is my misconfiguration of the server I
> still think it would be nicer if Squid didn't crash) and if so what
> information should I include?

Yes, as you point out the lack of sanity checks is not a good thing.
A good description of the problem, and anything else you believe might
give a hint towards some good sanity check in this case. Code-level if
possible.

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE6 or 3.0.STABLE13
   Current Beta Squid 3.1.0.5