Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 123748352 bytes) in /srv/www/ilias/digikos/Services/Database/classes/PDO/class.ilDBPdo.php on line 363

Fatal error: Uncaught ilDatabaseException: An undefined Database Exception occured. SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute. QUERY: SELECT 1 FROM usr_session WHERE session_id = 'uc13tt9pk5g02dm9ciqgaatm6m' in /srv/www/ilias/digikos/Services/Database/classes/PDO/class.ilDBPdo.php:368 Stack trace: #0 /srv/www/ilias/digikos/Services/Authentication/classes/class.ilSession.php(250): ilDBPdo->query() #1 /srv/www/ilias/digikos/Services/Authentication/classes/class.ilSession.php(152): ilSession::_exists() #2 /srv/www/ilias/digikos/Services/Authentication/classes/class.ilSessionDBHandler.php(83): ilSession::_writeData() #3 [internal function]: ilSessionDBHandler->write() #4 /srv/www/ilias/digikos/Services/UICore/classes/class.ilCtrl.php(498): session_write_close() #5 /srv/www/ilias/digikos/Services/Init/classes/class.ilErrorHandling.php(308): ilCtrl->redirectToURL() #6 /srv/www/ilias/digikos/libs/composer/vendor/filp/whoops/src/Whoops/Handler/CallbackHandler.php(50): ilErrorHandling->{closure}() #7 /srv/www/ilias/digikos/Services/Exceptions/classes/class.ilDelegatingHandler.php(106): Whoops\Handler\CallbackHandler->handle() #8 /srv/www/ilias/digikos/libs/composer/vendor/filp/whoops/src/Whoops/Run.php(403): ilDelegatingHandler->handle() #9 /srv/www/ilias/digikos/libs/composer/vendor/filp/whoops/src/Whoops/Run.php(487): Whoops\Run->handleException() #10 /srv/www/ilias/digikos/Services/Init/classes/class.ilErrorHandling.php(451): Whoops\Run->handleError() #11 [internal function]: ilErrorHandling->handlePreWhoops() #12 /srv/www/ilias/digikos/Services/UICore/classes/class.ilCtrl.php(498): session_write_close() #13 /srv/www/ilias/digikos/Services/Init/classes/class.ilErrorHandling.php(308): ilCtrl->redirectToURL() #14 /srv/www/ilias/digikos/libs/composer/vendor/filp/whoops/src/Whoops/Handler/CallbackHandler.php(50): ilErrorHandling->{closure}() #15 /srv/www/ilias/digikos/Services/Exceptions/classes/class.ilDelegatingHandler.php(106): Whoops\Handler\CallbackHandler->handle() #16 /srv/www/ilias/digikos/libs/composer/vendor/filp/whoops/src/Whoops/Run.php(403): ilDelegatingHandler->handle() #17 /srv/www/ilias/digikos/libs/composer/vendor/filp/whoops/src/Whoops/Run.php(487): Whoops\Run->handleException() #18 /srv/www/ilias/digikos/libs/composer/vendor/filp/whoops/src/Whoops/Run.php(520): Whoops\Run->handleError() #19 [internal function]: Whoops\Run->handleShutdown() #20 {main} thrown in /srv/www/ilias/digikos/Services/Database/classes/PDO/class.ilDBPdo.php on line 368