Andreas, thanks for verifying that there is an issue. Would you be able to test a httpd 2.4.55 with a mod_http2 from 2.4.54? If that runs without trouble, we have the problem verified with the recent changes in the http2 implementation.
Given that, could we check if we have a problem with the ulimit on open file descriptors? CentOS should be generous, but we could test if an increased limit has any effects on the situation. Further, looking at the list, all failed request seem to be plain files except the last. Is "/" the path used and does it also map to something like "index.html". Do you have non-file looksup where errors happen? I know that this is not a strong indicator, but may it helps us narrow this down. Thanks for your help, Stefan > Am 18.01.2023 um 10:05 schrieb Andreas S. Kerber <a...@ag-trek.de>: > > Am Wed, Jan 18, 2023 at 03:15:43AM -0500 schrieb Helmut K. C. Tessarek: >>> 2. As you see the 500 errors only in the access log are they only for >>> HTTP/2.0 or also for other protocol versions? > > I can confirm this too. I have a bunch of h2 servers serving static content > and a very small percentage of HTTP/2.0 requests are logged with a 500 error > right after upgrading to 2.4.55. > > In my case this is on CentOS 7, OpenSSL 1.1.1q, apr-1.6.3, apr-util-1.6.1, > libnghttp2-1.33 > > No customer noticed it, since (in my case) it is only about 0,01% of HTTP/2.0 > requests. Downgraded all h2 servers to 2.4.54 and the 500 errors are gone. > > First octet, and folder/filenames anonymized. We don't log User Agents or > anything more than that. I know this is not very helpful. Sorry about these > very sparse information :-( > > XX.200.70.42 - - [18/Jan/2023:08:48:18 +0100] "GET > /not-revealable/img/rdax_720x390s.jpg HTTP/2.0" 500 - > XX.188.223.140 - - [18/Jan/2023:08:50:48 +0100] "GET > /not-revealable/img/favicon.ico HTTP/2.0" 500 - > XX.88.81.152 - - [18/Jan/2023:08:51:04 +0100] "GET > /not-revealable/img/favicon.ico HTTP/2.0" 500 - > XX.88.81.152 - - [18/Jan/2023:08:51:09 +0100] "GET > /not-revealable/img/favicon.ico HTTP/2.0" 500 - > XX.179.130.67 - - [18/Jan/2023:08:51:45 +0100] "GET > /not-revealable/img/Digitae_1570x850px_rdax_720x390p.jpg HTTP/2.0" 500 - > XX.179.130.67 - - [18/Jan/2023:08:51:45 +0100] "GET > /not-revealable/img/Slide_rdax_720x390.png HTTP/2.0" 500 - > XX.179.130.67 - - [18/Jan/2023:08:52:58 +0100] "GET > /not-revealable/img/Adobetock_259606883_1570x850_rdax_720x390p.jpg HTTP/2.0" > 500 - > XX.179.130.67 - - [18/Jan/2023:08:52:59 +0100] "GET > /not-revealable/img/logo.png HTTP/2.0" 500 - > XX.247.9.187 - - [18/Jan/2023:08:54:48 +0100] "GET > /not-revealable/img/Klutrale_1570x850_rdax_720x390p.jpg HTTP/2.0" 500 - > XX.179.130.67 - - [18/Jan/2023:08:55:11 +0100] "GET / HTTP/2.0" 500 - >
