when i have a Blob doctrine column type and try to store binary content in it via doctrine orm, then an empty string instead of it's actual value is passed to the logger - as an empty-string item in array $params to Symfony\Bridge\Doctrine\Logger\DbalLogger::log - and json_encode in Monolog\Formatter\NormalizerFormatter on line 96 produces an exception (Warning: json_encode(): Invalid UTF-8 sequence).

the Blob is represented as LONGBLOB in mysql