When there is a memory error in core:archive process, have a way to see the backtrace #13196
Description
Use case
- A core:archive process fails with exhausted memory errors.
- We need to know what code path was active when the archiving failed.
Got
Example failure from cron:
Error: {"type":1,"message":"Allowed memory size of 8589934592 bytes exhausted (tried to allocate 20480 bytes)","file":"\/core\/DataTable\/Row.php","line":91}
Example failure with the define('PIWIK_PRINT_ERROR_BACKTRACE', true); in bootstrap.php
INFO [2018-07-23 15:51:47] 143396 SUMMARY OF ERRORS
INFO [2018-07-23 15:51:47] 143396 Error: Got invalid response from API request: ?module=API&method=API.get&idSite=8&period=year&date=last5&format=php&trigger=archivephp. Response was 'PHP Fatal error: Allowed memory size of 8589934592 bytes exhausted (tried to allocate 20480 bytes) in /core/DataTable/Row.php on line 91 a:2:{s:6:"result";s:5:"error";s:7:"message";s:832:"The request requested too much data. To avoid this error, please try to reduce the filter limit. #0 [internal function]: Piwik\Plugins\Cloud\Controller->safemode(Array)
#1 /core/FrontController.php(559): call_user_func_array(Array, Array)
#2 /core/FrontController.php(137): Piwik\FrontController->doDispatch('Cloud', 'safemode', Array)
#3 /core/FrontController.php(88): Piwik\FrontController->dispatch('CorePluginsAdmi...', 'safemode', Array)
#4 /core/FrontController.php(229): Piwik\FrontController::generateSafeModeOutputFromError(Array)
#5 [internal function]: Piwik\FrontController::triggerSafeModeWhenError()
#6 {main}";}'
ERROR [2018-07-23 15:51:47] 143396 1 total errors during this script execution, please investigate and try and fix these errors.
Expected instead
when we set define('PIWIK_PRINT_ERROR_BACKTRACE', true); in bootstrap.php then we would expect somehow to see the original backtrace of the code path that failed, rather than the backtrace of the safe mode.