Bug #53333 [Fbk]: Random crash

Edit report at http://bugs.php.net/bug.php?id=53333&edit=1 ID: 53333 Updated by: uw@php.net Reported by: pajoye@php.net Summary: Random crash Status: Feedback Type: Bug Package: MySQLi related Operating System: * PHP Version: 5.3.3 Assigned To: mysql Block user comment: N Private report: N New Comment: Hi Pierre, can you provide a mysqlnd debug log, do you have access to the php.ini? In 5.3.4 mysqlnd learned to write proper debug logs on Windows. Try running PHP with mysqlnd.debug="d:t:O,C:\mysqlnd_debug.log". You need 5.3.4. 5.3.3 won't do it. Thanks, Ulf Previous Comments: ------------------------------------------------------------------------ [2010-11-29 14:12:14] pajoye@php.net Yes, it happens as well with current SVN (5.3.4RC1 too). ------------------------------------------------------------------------ [2010-11-29 14:11:19] pajoye@php.net As I said it is not possible yet to get an isolated case. I would have done it already if yes. However, anyone able to do a post mortem analysis could see where and maybe why the crash occurs. memory dumb available if you have such developer (or someone willing to try, not too hard :). ------------------------------------------------------------------------ [2010-11-29 14:09:13] uw@php.net Pierre, of course, we'd love to see an isolated phpt test case. As you state, it is not necessarily a mysqli issue but may have some other cause. I agree that Andrey should look at the back trace. Can this reproduced with 5.3.4? If so, please check if you can give us a mysqlnd debug log. It is going to be *very* long. As a first step, please provide us with no more than the last 1000 lines from that log. 1000 lines is a a bit of a random pick to limit the expected long debug log. In 5.3.4 mysqlnd learned to write proper debug logs on Windows. Try running PHP with mysqlnd.debug="d:t:O,C:\mysqlnd_debug.log". You need 5.3.4. 5.3.3 won't do it. Andrey, can you have a look at the backtrace? Thanks, Ulf ------------------------------------------------------------------------ [2010-11-20 13:45:02] pajoye@php.net Can reproduce the crash with 5.3.4RC1 as well. It happens while switching apps (new DB connection with different credential). Updated bt: php5ts!_zend_mm_free_int+0x57 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_alloc.c @ 2018] php5ts!_efree+0x2e [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_alloc.c @ 2351] php5ts!zend_hash_destroy+0x27 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_hash.c @ 529] php5ts!zend_object_std_dtor+0x2b [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_objects.c @ 46] php_mysqli!mysqli_result_free_storage+0x3f [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\ext\mysqli\mysqli.c @ 270] php5ts!zend_objects_store_del_ref_by_handle_ex+0x1c1 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_objects_api.c @ 220] php5ts!zend_objects_store_del_ref+0x1a [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_objects_api.c @ 173] php5ts!_zval_dtor_func+0x7f [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_variables.c @ 60] php5ts!_zval_ptr_dtor+0x56 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_execute_api.c @ 443] php5ts!zend_leave_helper_SPEC+0x6c [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_vm_execute.h @ 160] php5ts!ZEND_RETURN_SPEC_TMP_HANDLER+0xa3 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_vm_execute.h @ 4970] php5ts!execute+0x2e8 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_vm_execute.h @ 107] php5ts!zend_call_function+0x8c9 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_execute_api.c @ 964] php5ts!zif_call_user_func_array+0x63 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\ext\standard\basic_functions.c @ 4796] php5ts!zend_do_fcall_common_helper_SPEC+0x920 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_vm_execute.h @ 316] php5ts!ZEND_DO_FCALL_SPEC_CONST_HANDLER+0x11a [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_vm_execute.h @ 1606] php5ts!execute+0x2e8 [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend_vm_execute.h @ 107] php5ts!zend_execute_scripts+0xfe [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\zend\zend.c @ 1195] php5ts!php_execute_script+0x24c [d:\php-sdk\snap_5_3\vc9\x86\php-5.3.4rc1\main\main.c @ 2265] ------------------------------------------------------------------------ [2010-11-18 01:26:55] pajoye@php.net Description: ------------ See the backtrace here http://pastie.org/1307118 The crash is hard to reproduce but happens regularly in our tests (using mediawiki, wordpress or other apps). Does it ring a bell to one of you (mysql devs :)? It could also be a GC bug. I can send the memory dump if one of you like to do a post morterm debugging. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=53333&edit=1