Fri, 10 Apr 2026 13:09:19 +0000 https://bugs.horde.org/ticket/6959 error 500 in imp/redirect on failed login I know this should be a problem with php or apache2, but I don't know what to do anymore. I'm using Horde Groupware Webmail Edition on Apache 2.2 with PHP5 (fast-cgi). Auth works over IMP (Cyrus 2.2 IMAP). All works fine, I can login, I can read mails, can create users and so on. I can do nearly everything in Horde when logged in. The problem is, when I log in with wrong username or password. The application works for some seconds and I get an error 500 and Apache error log says: [Fri Jun 20 08:41:41 2008] [error] [client 85.232.9.189] Premature end of script headers: redirect.php, referer: https://xxx/imp/redirect.php [Fri Jun 20 08:41:42 2008] [notice] mod_fcgid: process 4226 going graceful shutdown, sending SIGTERM [Fri Jun 20 08:41:48 2008] [warn] mod_fcgid: process 4226 graceful shutdown timeouted, sending SIGKILL [Fri Jun 20 08:41:54 2008] [notice] mod_fcgid: process /var/www/horde/imp/login.php(4226) exit(communication error), get stop signal 9 No other log provides more information. What can I do? When calling redirect.php direct in browser, I get redirected to login page. What's wrong? I don't believe in wrong configuration of the webserver (because all is fine when I'm correctly logged in). Fri, 20 Jun 2008 07:06:40 +0000 https://bugs.horde.org/ticket/6959#t46682 Forgot to say, that apache works with worker-model on Debian Etch. Perhaps, there is a wrong newline in redirect.php? Fri, 20 Jun 2008 07:42:37 +0000 https://bugs.horde.org/ticket/6959#t46683 Please see the FAQ. Fri, 20 Jun 2008 08:07:34 +0000 https://bugs.horde.org/ticket/6959#t46684 Found nothing in FAQ about "premature end....", "error 500"...Troubleshoot for Horde and IMP also contain no hint for my problem!? Give a hint... > Please see the FAQ. Fri, 20 Jun 2008 08:37:11 +0000 https://bugs.horde.org/ticket/6959#t46686 Hum, with php5-cli the error doesn't occur, only with php5-fcgi (I can reproduce this error). That's not what I want, because apache-worker doesn't work with php5-cli (only the prefork-model), but I still can't understand why I can do anything when logged in correctly and the script fails only on wrong login!? Fri, 20 Jun 2008 16:00:09 +0000 https://bugs.horde.org/ticket/6959#t46703 SOLVED: After trying for hours and reinstalling the whole system and experiencing with apache/php I've installed apache2-mod-worker with php5-cgi and mod_fastcgi. By default Debian Etch installs mod_fcgid (which is newer). By default mod_fastcgi's option idle-timeout is set to 30 seconds and with this value IMP crashs on wrong login. When set this option to 60 seconds - it works, looks like a wonder after hours of trouble :) So I reinstalled mod_fcgid and removed mod_fastcgi and set option IPCCommTimeout in mod_fcgid.conf to 60 seconds (by default 20 seconds) and so I don't get the error anymore. To be sure, I'll go on for a while with testing ;) Sat, 21 Jun 2008 16:35:57 +0000 https://bugs.horde.org/ticket/6959#t46712