No, but think I found the problem in the PHP-log by doing
rhc tail --app zot -l your@emailaddress -p your_password
on Hubzilla on OpenShift, but since its output actually displays username and password(!) I have changed these below. There where more lines containing cdav and 200 status code, so the problem seems to be located here:
[Mon Aug 08 15:52:44 2016] [error] [client 127.6.95.1] PHP Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002] No such file or directory' in /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/extend/addon/HubzillaAddons/cdav/Mod_Cdav.php:67\nStack trace:\n#0 /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/extend/addon/HubzillaAddons/cdav/Mod_Cdav.php(67): PDO->__construct('mysql:host=loca...', 'root_secret_username', 'roots_secret_password')\n#1 /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/Zotlabs/Web/Router.php(181): Zotlabs\\Module\\Cdav->init()\n#2 /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/Zotlabs/Web/WebServer.php(109): Zotlabs\\Web\\Router->Dispatch(NULL)\n#3 /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/index.php(14): Zotlabs\\Web\\WebServer->run()\n#4 {main}\n thrown in /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/extend/addon/HubzillaAddons/cdav/Mod_Cdav.php on line 67
81.166.162.135 - - [08/Aug/2016:15:52:44 -0400] "GET /cdav HTTP/1.1" 500 - "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0"
81.166.162.135 - - [08/Aug/2016:15:52:44 -0400] "GET /favicon.ico HTTP/1.1" 404 12763 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0"
81.166.162.135 - - [08/Aug/2016:15:52:44 -0400] "GET /favicon.ico HTTP/1.1" 404 12763 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0"
144.76.72.180 - - [08/Aug/2016:15:52:48 -0400] "POST /post HTTP/1.1" 200 48 "-" "Red"
81.166.162.135 - - [08/Aug/2016:15:53:00 -0400] "GET /cdav/calendar HTTP/1.1" 200 12619 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0"
[Mon Aug 08 15:55:05 2016] [error] [client 127.6.95.1] PHP Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002] No such file or directory' in /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/extend/addon/HubzillaAddons/cdav/Mod_Cdav.php:786\nStack trace:\n#0 /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/extend/addon/HubzillaAddons/cdav/Mod_Cdav.php(786): PDO->__construct('mysql:host=loca...', 'root_secret_username', 'roots_secret_password')\n#1 /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/Zotlabs/Web/Router.php(246): Zotlabs\\Module\\Cdav->get()\n#2 /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/Zotlabs/Web/WebServer.php(109): Zotlabs\\Web\\Router->Dispatch(NULL)\n#3 /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/index.php(14): Zotlabs\\Web\\WebServer->run()\n#4 {main}\n thrown in /var/lib/openshift/55999305e0b8cd838f000053/app-root/runtime/repo/extend/addon/HubzillaAddons/cdav/Mod_Cdav.php on line 786
NOTE: Even though I added each paragraph here into its own code-block they do not display, so there might be a subtle parsing bug. Please click the comment menu and the menu item View source to display the log information.
