Bug #75738 [Opn]: mmap/munmap loop?

Edit report at https://bugs.php.net/bug.php?id=75738&edit=1 ID: 75738 User updated by: albertcasademont at gmail dot com Reported by: albertcasademont at gmail dot com Summary: mmap/munmap loop? Status: Open Type: Bug Package: CGI/CLI related Operating System: Debian Stretch PHP Version: 7.1.12 Block user comment: N Private report: N New Comment: Disabling the extension seems to fix the problem. Also removed the USE_ZEND_ALLOC env var. I have reported it to the NR guys, is this still something that could be related to PHP Core? Previous Comments: ------------------------------------------------------------------------ [2017-12-27 17:37:30] nikic@php.net The new relic extension is probably unconditionally hooking into function calls, so the presence of nr_php_execute does not necessarily indicate an issue with new relic. Can you try whether the problem still reproduces with the new relic extension unloaded? ------------------------------------------------------------------------ [2017-12-27 17:22:54] albertcasademont at gmail dot com I installed gdb on the production machine and did a bt on the process, this is the output. Seems like there's something wrong with a shutdown function in a Newrelic extension? #0 0x000055d54756cce8 in zif_array_unshift () #1 0x000055d5476e24cd in ?? () #2 0x000055d54768921b in execute_ex () #3 0x00007f4c899af1bb in nr_php_execute_enabled () at /home/hudson/slave-workspace/workspace/php-release-agent/label/centos5-64-nrcamp/agent/php_execute.c:1191 #4 0x00007f4c899af802 in nr_php_execute () at /home/hudson/slave-workspace/workspace/php-release-agent/label/centos5-64-nrcamp/agent/php_execute.c:1301 #5 0x000055d54762f0e4 in zend_call_function () #6 0x000055d54762f385 in _call_user_function_ex () #7 0x000055d547575597 in ?? () #8 0x000055d5476513fa in zend_hash_apply () #9 0x000055d547578ae6 in php_call_shutdown_functions () #10 0x000055d5475da015 in php_request_shutdown () #11 0x000055d5476e5a60 in ?? () #12 0x000055d5474b6c19 in main () Not sure if this is still a relevant PHP bug or should i fill it with the NR guys. ------------------------------------------------------------------------ [2017-12-27 17:17:37] albertcasademont at gmail dot com Interestingly enough, the strace doesn't display anything at all with that flag, which is weird. Process is still in a neverending loop wasting CPU, though. ------------------------------------------------------------------------ [2017-12-27 17:15:02] albertcasademont at gmail dot com Hi Nikita, Yes, the issue still happens with USE_ZEND_ALLOC=0 ------------------------------------------------------------------------ [2017-12-27 16:55:07] albertcasademont at gmail dot com Hi Nikita, Thanks, trying it now, we normally see the problem happening every 10-20 minutes, will get back asap. ------------------------------------------------------------------------ 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 https://bugs.php.net/bug.php?id=75738 -- Edit this bug report at https://bugs.php.net/bug.php?id=75738&edit=1