Assert error in VPX_Send_Proxy()

[Christopher Beppler]

Hi,

Thank you.

I've submitted it as #2613.

While looking at the panic, it might be triggered by a PROPFIND from an
OpenOffice client. But it could also just be a coincident.

Regards,
Christopher

Am 15.03.2018 um 13:39 schrieb Dag Haavi Finstad:
> Hi Christopher,
> 
> This certainly looks like a bug.
> 
> Could you please report this in
> https://github.com/varnishcache/varnish-cache/issues ?
> 
> Please include as much detail as possible, and the full panic output
> from 'varnishadm panic.show'.
> 
> On Thu, Mar 15, 2018 at 8:01 AM, Christopher Beppler <varnish at funzi.de
> <mailto:varnish at funzi.de>> wrote:
> 
>     Hi,
> 
>     I am new to this list and I hope that someone here can shed some light
>     on my issue. I have googled the error message but didn't find anything
>     related to VPX_Send_Proxy().
> 
>     My setup is as follows:
> 
>     Haproxy --(proxy-v2)-> varnish --(proxy-v1)-> nginx -> webapps
> 
>     I am running FreeBSD 11.1-RELEASE-p4 and varnish5-5.2.1 from ports.
> 
>     Since a few days, I get the following error message. Not all the time,
>     but always around the same time. So it might be an issue related to a
>     certain load:
> 
>     Mar 14 23:44:04 varnish varnishd[15349]: Child (24895) Panic at: Wed, 14
>     Mar 2018 22:44:04 GMT Assert error in VPX_Send_Proxy(),
>     proxy/cache_proxy_proto.c line 425:   Condition((sp) != NULL) not true.
>     version = varnish-5.2.1 revision NOGIT, vrt api = 6.1 ident =
>     FreeBSD,11.1-RELEASE-p4,amd64,-junix,-sfile,-smalloc,-hcritbit,kqueue
>     now = 4710006.893845 (mono), 1521067443.500616 (real) Backtrace:
>     0x437e60: <PAN_Init+0x2f0> at /usr/local/sbin/varnishd   0x47e0bc:
>     <VAS_Fail+0x6c> at /usr/local/sbin/varnishd   0x46fb96:
>     <VPX_Send_Proxy+0x356> at /usr/local/sbin/varnishd   0x4173bf:
>     <VBE_fill_director+0x128f> at /usr/local/sbin/varnishd   0x4162f7:
>     <VBE_fill_director+0x1c7> at /usr/local/sbin/varnishd   0x43d184:
>     <CNT_Request+0x1cf4> at /usr/local/sbin/varnishd   0x458841:
>     <V1F_FetchRespHdr+0xd81> at /usr/local/sbin/varnishd   0x451f96:
>     <pool_herder+0x986> at /usr/local/sbin/varnishd   0x451d15:
>     <pool_herder+0x705> at /usr/local/sbin/varnishd thread = (cache-worker)
>     thr.req = 0x80f902ba0 {   vxid = 98306, transport
> 
>     This results in a client disconnect. If I retry loading the page it
>     sometimes work.
> 
>     If I am not mistaken, varnish kills a process/thread if an assertion
>     fails and spawns a new one to stay in a clean state. That's why I don't
>     have to restart anything. After some time, it seems to recover but
>     during the time this error appears the page is almost unusable.
> 
>     Why question would now be what I can do to resolve that and what it
>     means that sp == NULL at this particular assertion?
> 
>     If you need more logs or details, I am happy to provide them.
> 
>     Thanks in advance,
>     Christopher
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> 
> 
> 
> 
> -- 
> Dag Haavi Finstad
> Software Developer | Varnish Software
> Mobile: +47 476 64 134
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