I am running two sites and all of a sudden Im getting a lot of 500 server errors. Happened out of no where. My error log has a ton of stuff going on, to much for me to understand. A lot of mentions of zend optimizer. Really need someone who knows what they are doing, and good reputation is a must for paid help. Thanks
Hi Oldsteel68. Did you try to contact your host and ask if they have changed the server configuration/software?
If you're on a dedi/VPS try recompiling Apache, this may solve the problem. Also make sure that PHP processes are allowed a decent amount of RAM/Memory before being killed off.
post more info about your hosting account or server. is it a dedicated box or a shared one? what was the last changes that you made?
500 internal error is an general error but not an client side issue. If you don't have enough knowledge, your host should be able to assist you to locate and analyze through logs about the error. Please contact me in case you are still facing errors. Thank you.
Well, woke up today and all my sites are down, completely.. BLUEHOST [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] PHP Warning: Unknown(): (null): Unable to initialize module [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] Module compiled with module API=20060613, debug=0, thread-safety=0 [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] PHP compiled with module API=20020429, debug=0, thread-safety=0 [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] These options need to match [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] in Unknown on line 0 [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] PHP Warning: Unknown(): Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20060613/sqlite.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20060613/sqlite.so: undefined symbol: spl_ce_Countable in Unknown on line 0 [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] PHP Warning: Unknown(): (null): Unable to initialize module [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] Module compiled with module API=20060613, debug=0, thread-safety=0 [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] PHP compiled with module API=20020429, debug=0, thread-safety=0 [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] These options need to match [Sun Feb 17 08:19:10 2008] [error] [client 69.89.25.186] in Unknown on line 0 [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] Premature end of script headers: local-urchin-js.php, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] PHP Warning: Unknown(): Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20060613/pdo.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20060613/pdo.so: undefined symbol: zend_ce_traversable in Unknown on line 0, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] PHP Warning: Unknown(): (null): Unable to initialize module, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] Module compiled with module API=20060613, debug=0, thread-safety=0, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] PHP compiled with module API=20020429, debug=0, thread-safety=0, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] These options need to match, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] in Unknown on line 0, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] PHP Warning: Unknown(): Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20060613/sqlite.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20060613/sqlite.so: undefined symbol: spl_ce_Countable in Unknown on line 0, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] PHP Warning: Unknown(): (null): Unable to initialize module, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] Module compiled with module API=20060613, debug=0, thread-safety=0, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] PHP compiled with module API=20020429, debug=0, thread-safety=0, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] These options need to match, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:11 2008] [error] [client 76.169.209.96] in Unknown on line 0, referer: http://www.contrarianvalueinvesting.com/2008/02/13/4-underrated-value-investing-books/ [Sun Feb 17 08:19:12 2008] [error] [client 83.60.172.180] Premature end of script headers: index.php [Sun Feb 17 08:19:15 2008] [error] [client 74.208.14.215] Premature end of script headers: index.php [Sun Feb 17 08:19:19 2008] [error] [client 65.4.76.235] Premature end of script headers: index.php [Sun Feb 17 08:19:19 2008] [error] [client 77.52.137.15] Failed loading /usr/local/Zend/lib/ZendOptimizer.so: /usr/local/Zend/lib/ZendOptimizer.so: cannot open shared object file: No such file or directory, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:19 2008] [error] [client 77.52.137.15] Premature end of script headers: ptpl.index.php, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:19 2008] [error] [client 77.52.137.15] Failed loading /usr/local/Zend/lib/ZendOptimizer.so: /usr/local/Zend/lib/ZendOptimizer.so: cannot open shared object file: No such file or directory, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:19 2008] [error] [client 77.52.137.15] Premature end of script headers: 500.php, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:24 2008] [error] [client 66.249.73.249] Premature end of script headers: index.php [Sun Feb 17 08:19:24 2008] [error] [client 65.4.76.235] Premature end of script headers: index.php, referer: http://profile.myspace.com/index.cf...&MyToken=73b78b69-f5ee-459a-b2e4-d8b57aeab172 [Sun Feb 17 08:19:25 2008] [error] [client 66.232.114.74] Premature end of script headers: index.php [Sun Feb 17 08:19:26 2008] [error] [client 69.89.25.186] Premature end of script headers: wp-cron.php [Sun Feb 17 08:19:26 2008] [error] [client 77.52.137.15] Failed loading /usr/local/Zend/lib/ZendOptimizer.so: /usr/local/Zend/lib/ZendOptimizer.so: cannot open shared object file: No such file or directory, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:26 2008] [error] [client 77.52.137.15] Premature end of script headers: ptpl.index.php, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:26 2008] [error] [client 77.52.137.15] Failed loading /usr/local/Zend/lib/ZendOptimizer.so: /usr/local/Zend/lib/ZendOptimizer.so: cannot open shared object file: No such file or directory, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:26 2008] [error] [client 77.52.137.15] Premature end of script headers: 500.php, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:27 2008] [error] [client 69.89.25.186] Premature end of script headers: wp-cron.php [Sun Feb 17 08:19:27 2008] [error] [client 217.212.224.181] Premature end of script headers: index.php [Sun Feb 17 08:19:30 2008] [error] [client 69.89.25.186] Premature end of script headers: wp-cron.php [Sun Feb 17 08:19:32 2008] [error] [client 74.6.20.227] Premature end of script headers: display.php [Sun Feb 17 08:19:37 2008] [error] [client 67.166.108.112] Premature end of script headers: index.php, referer: http://www.straightlineperformance.com/Ordering.htm [Sun Feb 17 08:19:37 2008] [error] [client 67.166.108.112] Premature end of script headers: 500.php, referer: http://www.straightlineperformance.com/Ordering.htm [Sun Feb 17 08:19:41 2008] [error] [client 91.186.11.5] Premature end of script headers: index.php [Sun Feb 17 08:19:44 2008] [error] [client 78.149.105.102] Premature end of script headers: index.php, referer: http://www.lagancollege.org/moodle/login/index.php [Sun Feb 17 08:19:45 2008] [error] [client 201.78.25.59] Premature end of script headers: display.php, referer: http://www.google.com/search?hl=en&...lt&cd=1&q=disable+keypress+javascript&spell=1 [Sun Feb 17 08:19:45 2008] [error] [client 77.52.137.15] Failed loading /usr/local/Zend/lib/ZendOptimizer.so: /usr/local/Zend/lib/ZendOptimizer.so: cannot open shared object file: No such file or directory, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:45 2008] [error] [client 77.52.137.15] Premature end of script headers: ptpl.index.php, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:45 2008] [error] [client 77.52.137.15] Failed loading /usr/local/Zend/lib/ZendOptimizer.so: /usr/local/Zend/lib/ZendOptimizer.so: cannot open shared object file: No such file or directory, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:45 2008] [error] [client 77.52.137.15] Premature end of script headers: 500.php, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:48 2008] [error] [client 91.186.11.5] Premature end of script headers: index.php [Sun Feb 17 08:19:48 2008] [error] [client 91.186.11.5] Premature end of script headers: index.php [Sun Feb 17 08:19:52 2008] [error] [client 78.149.105.102] Premature end of script headers: index.php, referer: http://www.lagancollege.org/moodle/login/index.php [Sun Feb 17 08:19:53 2008] [error] [client 71.101.240.189] Premature end of script headers: index.php [Sun Feb 17 08:19:55 2008] [error] [client 69.89.25.186] Premature end of script headers: wp-cron.php [Sun Feb 17 08:19:55 2008] [error] [client 209.91.13.147] Premature end of script headers: index-extra.php, referer: http://www.biggerthanyourhead.net/wp-admin/ [Sun Feb 17 08:19:59 2008] [error] [client 77.52.137.15] Failed loading /usr/local/Zend/lib/ZendOptimizer.so: /usr/local/Zend/lib/ZendOptimizer.so: cannot open shared object file: No such file or directory, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:59 2008] [error] [client 77.52.137.15] Premature end of script headers: ptpl.index.php, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:59 2008] [error] [client 77.52.137.15] Failed loading /usr/local/Zend/lib/ZendOptimizer.so: /usr/local/Zend/lib/ZendOptimizer.so: cannot open shared object file: No such file or directory, referer: http://site4fast.com/Home.html [Sun Feb 17 08:19:59 2008] [error] [client 77.52.137.15] Premature end of script headers: 500.php, referer: http://site4fast.com/Home.html [Sun Feb 17 08:20:00 2008] [error] [client 78.149.105.102] Premature end of script headers: index.php, referer: http://www.lagancollege.org/moodle/login/index.php
It seems your host has just recompiled PHP? And they missed to install Zend Optimizer? Also, the dynamic extension path was changed, so PHP could not load some modules Can you paste a link to phpinfo?
Those links are where the visitors are coming from. The last page they visited before your site. Called referrers (referer if you write RFCs). And you should ask your webhost to check that the zend optimzer is loading properly on your server.
Instead of concentrating on your business, you have to look into the technical aspects of your website. Thus I would suggest you to ask your hosting provider to get this fixed asap, or just look for another hosting provider who can fulfill your requirements.