Exception: Prepared statement contains too many placeholders - {"exception":"Doctrine\\DBAL\\Driver\\Mysqli\\MysqliException: Prepared statement contains too many placeholders

Note for reproducing : You can also reproduce this in the backend in an installation with many pages. You don't have to check broken links at all. Just load the list on a page with many subpages (and "Show this level" "infinite") (to get the "Prepared statement contains too many placeholders" exception).

You should create at least one broken link first and run the check for the page, to make sure displaying the list works correctly.

Scheduler task¶

Reproduce (scheduler task)¶

1. site with many pages (I have 40000)
2. create scheduler task with start page and depth "infinite"

Error in scheduler task¶

In the scheduler task it happens when the (old) number of broken links is calculated (before link checking is performed). Linkvalidator recursively fetches a list of all pages (depending on depth) and then performs a DB query on that

Problem is the way linkvalidator queries. It recursively collects a list of all pages from current page (depending on depth). And then performs a query on it with "WHERE record_pid in (223, 34, etc.).

While this may be efficient (in comparison to several queries) for small sites, it creates a problem for large sites.

Exception (in scheduler task)¶

Prepared statement contains too many placeholders - {"exception":"Doctrine\\DBAL\\Driver\\Mysqli\\MysqliException: Prepared statement contains too many placeholders in /var/www/mysite/htdocs/typo3_src-9.5.22/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/Mysqli/MysqliStatement.php:86
Stack trace:
#0 /var/www/mysite/htdocs/typo3_src-9.5.22/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/Mysqli/MysqliConnection.php(131): Doctrine\\DBAL\\Driver\\Mysqli\\MysqliStatement->__construct(Object(mysqli), 'SELECT `link_ty...')
#1 /var/www/mysite/htdocs/typo3_src-9.5.22/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(901): Doctrine\\DBAL\\Driver\\Mysqli\\MysqliConnection->prepare('SELECT `link_ty...')
#2 /var/www/mysite/htdocs/typo3_src-9.5.22/vendor/doctrine/dbal/lib/Doctrine/DBAL/Query/QueryBuilder.php(206): Doctrine\\DBAL\\Connection->executeQuery('SELECT `link_ty...', Array, Array)
#3 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/core/Classes/Database/Query/QueryBuilder.php(191): Doctrine\\DBAL\\Query\\QueryBuilder->execute()
#4 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/linkvalidator/Classes/LinkAnalyzer.php(466): TYPO3\\CMS\\Core\\Database\\Query\\QueryBuilder->execute()
#5 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/linkvalidator/Classes/Task/ValidatorTask.php(351): TYPO3\\CMS\\Linkvalidator\\LinkAnalyzer->getLinkCounts(3)
#6 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/linkvalidator/Classes/Task/ValidatorTask.php(295): TYPO3\\CMS\\Linkvalidator\\Task\\ValidatorTask->checkPageLinks(3)
#7 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/scheduler/Classes/Scheduler.php(179): TYPO3\\CMS\\Linkvalidator\\Task\\ValidatorTask->execute()
#8 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/scheduler/Classes/Command/SchedulerCommand.php(145): TYPO3\\CMS\\Scheduler\\Scheduler->executeTask(Object(TYPO3\\CMS\\Linkvalidator\\Task\\ValidatorTask))
#9 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/scheduler/Classes/Command/SchedulerCommand.php(99): TYPO3\\CMS\\Scheduler\\Command\\SchedulerCommand->loopTasks()
#10 /var/www/mysite/htdocs/typo3_src-9.5.22/vendor/symfony/console/Command/Command.php(255): TYPO3\\CMS\\Scheduler\\Command\\SchedulerCommand->execute(Object(Symfony\\Component\\Console\\Input\\ArgvInput), Object(Symfony\\Component\\Console\\Output\\ConsoleOutput))
#11 /var/www/mysite/htdocs/typo3_src-9.5.22/vendor/symfony/console/Application.php(1001): Symfony\\Component\\Console\\Command\\Command->run(Object(Symfony\\Component\\Console\\Input\\ArgvInput), Object(Symfony\\Component\\Console\\Output\\ConsoleOutput))
#12 /var/www/mysite/htdocs/typo3_src-9.5.22/vendor/symfony/console/Application.php(271): Symfony\\Component\\Console\\Application->doRunCommand(Object(TYPO3\\CMS\\Scheduler\\Command\\SchedulerCommand), Object(Symfony\\Component\\Console\\Input\\ArgvInput), Object(Symfony\\Component\\Console\\Output\\ConsoleOutput))
#13 /var/www/mysite/htdocs/typo3_src-9.5.22/vendor/symfony/console/Application.php(147): Symfony\\Component\\Console\\Application->doRun(Object(Symfony\\Component\\Console\\Input\\ArgvInput), Object(Symfony\\Component\\Console\\Output\\ConsoleOutput))
#14 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/core/Classes/Console/CommandRequestHandler.php(63): Symfony\\Component\\Console\\Application->run(Object(Symfony\\Component\\Console\\Input\\ArgvInput), Object(Symfony\\Component\\Console\\Output\\ConsoleOutput))
#15 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/core/Classes/Console/CommandApplication.php(48): TYPO3\\CMS\\Core\\Console\\CommandRequestHandler->handleRequest(Object(Symfony\\Component\\Console\\Input\\ArgvInput))
#16 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/core/bin/typo3(23): TYPO3\\CMS\\Core\\Console\\CommandApplication->run()
#17 /var/www/mysite/htdocs/typo3_src-9.5.22/typo3/sysext/core/bin/typo3(24): {closure}()
#18 {main}

Next Doctrine\\DBAL\\Exception\\DriverException: An exception occurred while executing 'SELECT `link_type`, COUNT(`uid`) AS `nbBrokenLinks` FROM `tx_linkvalidator_link` WHERE ((`record_uid` IN (?,

Reproduce (linkvalidator report)¶

1. Site with many pages
2. In report choose all link types and depth "infinite"

System¶

• TYPO3 Version: 9.5.22 - I added some log messages, so the line numbers may not be correct
• 40000 pages (not hidden and not deleted)