Fri, 10 Apr 2026 03:14:08 +0000 https://bugs.horde.org/ticket/14663 Bug with Apache mod_http2 Hiho guys, after updating my apache 2.4.25 to 2.4.26 with mod_http2 loaded / configured /default) Kronolith stops loading events in the calendar views (or just load it "sporadically") while most time an error with the server connection is shown (red). Tried different PHP versions and different fresh installs of Horde too. Workaround: Disable mod_http2 for now. hth many thanks, bst regards, Niels. http://www.syndicat.com Thu, 29 Jun 2017 14:32:22 +0000 https://bugs.horde.org/ticket/14663#t92007 How is that a bug in Kronolith? Thu, 29 Jun 2017 15:42:49 +0000 https://bugs.horde.org/ticket/14663#t92019 > How is that a bug in Kronolith? I'm not shure, because i couldn't investigate / debug that issue much further. It seems that some Javascript / AJAX scripts from Kronolith (and only kronolith) has problems to connect to the server (some sockets or similiar?). I got no error entries within the horde nor apache logs (just in kronolith). The used Apache config is default on many distributions and i didn't find any other applications which seems affected under this Apache release - so i have to assume that Kronolith has to be "fixed" there. But yes - it may possible too that there is a bug in Apache or PHP / Apache. Apache published that their update from 2.4.25 to 2.5.26 contains a lot of fixes within the HTTP2 stack and https://www.apachelounge.com/Changelog-2.4.html I don't know how far Horde5 is still making use of HTTP2. If it helps i could try to debug. many thanks for your time, Niels. Thu, 29 Jun 2017 19:39:53 +0000 https://bugs.horde.org/ticket/14663#t92021 Horde doesn't make *any* use of HTTP/2, that's why it shouldn't be Horde's fault. Thu, 29 Jun 2017 19:57:02 +0000 https://bugs.horde.org/ticket/14663#t92022 > Horde doesn't make *any* use of HTTP/2, that's why it shouldn't be > Horde's fault. Ok, may be it could makes sense to extend your docs about this if more users run into the same problem with current / future Apache versions) to disable HTTP2 within horde Virtual Hosts (as HTTP2 gets productive in Apache with this version and will get activated by many admins globally). I.e. within VirtualHost Context: Protocols http/1.1 It taked me some hours to find out this, because i thought the same way and kronolith was the only application i've found which had any problems with the current Apache Version (with HTTP2 globally activated). hth someone - if not, sorry for the noise... many thanks, Niels. Thu, 29 Jun 2017 20:17:49 +0000 https://bugs.horde.org/ticket/14663#t92023 FWIW, I just tried the latest Apache version with mod_http2 enabled and didn't experience any problems with Kronolith from master branch. Thu, 29 Jun 2017 22:05:03 +0000 https://bugs.horde.org/ticket/14663#t92024