🇨🇿Czech Republic @petrsocha

Adjusting the settings.php fixes the issue:

$databases['default']['default'] = array (
...
'init_commands' => [
'big_selects' => 'SET SQL_BIG_SELECTS=1',
],
'pdo' => [
PDO::ATTR_TIMEOUT => 5,
],
);

But since 50 users isn't really a big select, I suppose the database query is not very well formed.

Any quick fix suggestion would be highly appreciated, as this has happened on a production site. Thank you very much.

petrsocha → created an issue.

petrsocha → created an issue.