#20988 [Opn-Fbk]: Apache segfaults using MM session on garbage collection
ID: 20988 Updated by: [EMAIL PROTECTED] Reported By: [EMAIL PROTECTED] -Status: Open +Status: Feedback Bug Type: Session related Operating System: Linux 2.4.19 (Debian) PHP Version: 4.3.0RC3 New Comment: Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php Once you have generated a backtrace, please submit it to this bug report and change the status back to Open. Thank you for helping us make PHP better. Previous Comments: [2002-12-13 06:54:22] [EMAIL PROTECTED] Apache 1.3.27 PHP 4.3.0RC3: Configure Command = './configure' '--with-mysql' '--with-dom' '--with-dom-xslt' '--with-apxs=/usr/bin/apxs' '--with-zlib' '--with-mm' This can be reproduced by a script: ? session_start() $_SESSION['temp'] = 'test'; ? in php.ini set garbage collection to be called often and set MM session handler: session.save_handler = mm session.gc_probability = 1 session.gc_dividend= 1 session.gc_maxlifetime = 30 To reproduce run: ab -n 1 http://server/above_script.php Note that this bug is also reproducible on FreeBSD with php 4.3.2 - will not post another bug report. -- Edit this bug report at http://bugs.php.net/?id=20988edit=1
#20988 [Opn-Fbk]: Apache segfaults using MM session on garbage collection
ID: 20988 Updated by: [EMAIL PROTECTED] Reported By: [EMAIL PROTECTED] -Status: Open +Status: Feedback Bug Type: Session related Operating System: Linux 2.4.19 (Debian) PHP Version: 4.3.0RC3 Previous Comments: [2002-12-13 06:56:27] [EMAIL PROTECTED] of course there should be: ? session_start(); $_SESSION['temp'] = 'test'; ? semicolon missing [2002-12-13 06:55:24] [EMAIL PROTECTED] Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php Once you have generated a backtrace, please submit it to this bug report and change the status back to Open. Thank you for helping us make PHP better. [2002-12-13 06:54:22] [EMAIL PROTECTED] Apache 1.3.27 PHP 4.3.0RC3: Configure Command = './configure' '--with-mysql' '--with-dom' '--with-dom-xslt' '--with-apxs=/usr/bin/apxs' '--with-zlib' '--with-mm' This can be reproduced by a script: ? session_start() $_SESSION['temp'] = 'test'; ? in php.ini set garbage collection to be called often and set MM session handler: session.save_handler = mm session.gc_probability = 1 session.gc_dividend= 1 session.gc_maxlifetime = 30 To reproduce run: ab -n 1 http://server/above_script.php Note that this bug is also reproducible on FreeBSD with php 4.3.2 - will not post another bug report. -- Edit this bug report at http://bugs.php.net/?id=20988edit=1
#20988 [Opn-Fbk]: Apache segfaults using MM session on garbage collection
ID: 20988 Updated by: [EMAIL PROTECTED] Reported By: [EMAIL PROTECTED] -Status: Open +Status: Feedback Bug Type: Session related Operating System: Linux 2.4.19 (Debian) PHP Version: 4.3.0RC3 New Comment: That is not a back trace, please follow the instructions as described here: http://bugs.php.net/bugs-generating-backtrace.php Previous Comments: [2002-12-13 07:00:15] [EMAIL PROTECTED] Apache segfault log entry: [Sat Dec 14 03:41:39 2002] [notice] child pid 3613 exit signal Segmentation fault (11) [2002-12-13 06:56:27] [EMAIL PROTECTED] of course there should be: ? session_start(); $_SESSION['temp'] = 'test'; ? semicolon missing [2002-12-13 06:55:24] [EMAIL PROTECTED] Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php Once you have generated a backtrace, please submit it to this bug report and change the status back to Open. Thank you for helping us make PHP better. [2002-12-13 06:54:22] [EMAIL PROTECTED] Apache 1.3.27 PHP 4.3.0RC3: Configure Command = './configure' '--with-mysql' '--with-dom' '--with-dom-xslt' '--with-apxs=/usr/bin/apxs' '--with-zlib' '--with-mm' This can be reproduced by a script: ? session_start() $_SESSION['temp'] = 'test'; ? in php.ini set garbage collection to be called often and set MM session handler: session.save_handler = mm session.gc_probability = 1 session.gc_dividend= 1 session.gc_maxlifetime = 30 To reproduce run: ab -n 1 http://server/above_script.php Note that this bug is also reproducible on FreeBSD with php 4.3.2 - will not post another bug report. -- Edit this bug report at http://bugs.php.net/?id=20988edit=1
#20988 [Opn-Fbk]: Apache segfaults using MM session on garbage collection
ID: 20988 Updated by: [EMAIL PROTECTED] Reported By: [EMAIL PROTECTED] -Status: Open +Status: Feedback Bug Type: Session related Operating System: Linux 2.4.19 (Debian) PHP Version: 4.3.0RC3 New Comment: Before this backtrace, GDB should have spit out an error too with a source line, can you please paste that one in the form, and also the result of: print data and print sd (at the same place as were you typed 'bt'). thanks! Derick Previous Comments: [2002-12-13 08:20:18] [EMAIL PROTECTED] Managed to get backtrace on FreeBSD box: #0 0x48287655 in ps_sd_destroy (data=0x811b0a0, sd=0x4c6c2354) at mod_mm.c:168 #1 0x4828784f in ps_mm_destroy (data=0x811b0a0) at mod_mm.c:242 #2 0x48287a25 in zm_shutdown_ps_mm (type=1, module_number=11) at mod_mm.c:293 #3 0x48231e93 in module_destructor (module=0x811c500) at zend_API.c:1127 #4 0x482338d3 in zend_hash_destroy (ht=0x48333b80) at zend_hash.c:541 #5 0x4822ef3f in zend_shutdown () at zend.c:492 #6 0x4823c107 in php_module_shutdown () at main.c:1052 #7 0x4823c0d4 in php_module_shutdown_wrapper (sapi_globals=0x48311880) at main.c:1029 #8 0x48239abc in apache_php_module_shutdown_wrapper () at mod_php4.c:800 #9 0x805003a in run_cleanups () #10 0x804f09f in ap_clear_pool () #11 0x804f100 in ap_destroy_pool () #12 0x804f08b in ap_clear_pool () #13 0x804f100 in ap_destroy_pool () #14 0x8059460 in clean_parent_exit () #15 0x805b925 in standalone_main () #16 0x805bd6b in main () #17 0x804eb0d in _start () [2002-12-13 07:57:20] [EMAIL PROTECTED] While trying to backtrace a particular forked child it would not segfault until i detach gdb from it - then it segfaults with: [Sat Dec 14 05:02:19 2002] [notice] child pid 4858 exit signal Segmentation fault (11) [2002-12-13 07:34:33] [EMAIL PROTECTED] I know it's not a backtrace. I have just forgot to paste apache log segfault line example in my original posting. However. When trying to backtrace I cannot reproduce this behavior. It's happening under constant heavy load that can be simulated using ab -n 1 and the example script I have supplied. Only after about 3000-4000 request this one happens. I cannot execute 3000 request because httpd -X exits after several hundred requests (normal exit - no backtrace) and I don't know why. [2002-12-13 07:01:55] [EMAIL PROTECTED] That is not a back trace, please follow the instructions as described here: http://bugs.php.net/bugs-generating-backtrace.php [2002-12-13 07:00:15] [EMAIL PROTECTED] Apache segfault log entry: [Sat Dec 14 03:41:39 2002] [notice] child pid 3613 exit signal Segmentation fault (11) The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/20988 -- Edit this bug report at http://bugs.php.net/?id=20988edit=1
