Bug#1036213: apache2: frequent SIGSEGV in mod_http2.so (purge_consumed_buckets)

[Stefan Eissing <stefan@eissing.org>]

> Am 19.05.2023 um 18:50 schrieb Bastien Durel <bastien@durel.org>:
> 
> Le 19/05/2023 à 18:11, Stefan Eissing a écrit :
>> Hi Bastien,
> Hello
> 
>> I am looking into the failures of mod_proxy_http2 and seeing an issue with connection reuse and subsequent handling of requests.
>> Going back to the original issue, do you still see those with mod_h2 v2.0.15? That would be interesting to know.
> No, I had only 2 segfaults since I upgraded to 2.0.15, and none is in purge_consumed_buckets :
> 
> - proxy_pass_brigade
> - ap_save_brigade
> 
>> I do not know if just relying on mod_proxy_http in your setup would be possible. But it could help us isolating issues.
> 
> I don't think so ... The knot-resolver I forward DOH requests to seems to only support HTTP/2 ; if I change it to https://, dog fails to resolve on it :
> 
> Error [http]: Nameserver returned HTTP 502 (Proxy Error)

I just released v2.0.16 <https://github.com/icing/mod_h2/releases/tag/v2.0.16>. It contains a fix in mod_proxy_http2 retry handling. Not sure if this is related to your crashes as I was so far unsuccessful to reproduce those locally. But maybe you'd like to give this a try.

Kind Regards,
Stefan

> 
> Regards,
> 
> -- 
> Bastien Durel
>