[PHP] Apache and PHP segfaults on Redhat EL5
Hello, I have been working over the last few months to try and get to the bottom of why our apache processes are regularly being killed with a Sig 11 (Segmentation Fault). Here are the messages in the kern.log httpd[22309]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[21819]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[19168]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[21597]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[22871]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[22090]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[21970]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[22315]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[21808]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[21801]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[20469]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[23509]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[21967]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[21814]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[24017]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[21605]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[24329]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[23573]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[24328]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[22301]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[24636]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[25028]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[22869]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 httpd[25030]: segfault at 7fffd01b4ffc rip 2b1f935c064c rsp 7fffd01b4f90 error 6 We literally have thousands of those, I have tracked it down as far as being caused by mod_php in apache (Redhat 5 update 5). However when I enabled coredump's in apache I don't get anything. I can however get a dump if I send a manual sig 11 to the process. Which brings me to my questions. Is there a method or way that I can enable a 'debug' mode in php which would help me track down and identify the root cause of these problems? If anyone has any suggestions on what I can do to try and get further down the track to enlightenment I would be really appreciated. Regards, Jimmy. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] PHP Error logging
Hello, I currently have a strange issue where we are seeing 'random errors' being displayed to end users. What I find most interesting is that in the php.ini file we have the following error settings. error_reporting = E_ALL & ~E_NOTICE display_errors = Off display_startup_errors = Off log_errors = On log_errors_max_len = 1024 ignore_repeated_errors = Off track_errors = Off I thought that if we had dislay_errors = Off then end users should never see errors displayed on the web page. However at apparently random times we do still see errors being reported, its not consistent at all. To give a better idea of the problem we have 8 web servers, they all run an identical copy of the site which is stored on a common netapp nfs filer. At apparently random times we see that 1 out of 8 servers will reported strange errors like 'use of undefined constant' or 'Undefined variable'. What's most strange about these errors is that if the code was faulty wouldn't we expect to see the errors on all web servers? and secondly wouldn't we expect to see the errors constantly rather than at apparently random intervals? The php.ini files have a modify time of mid 2010 and yet this problem has only started in the last few weeks. Has anyone else experienced similar problems in the past and if so what was the root cause? Regards, Jimmy -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
