Mysql error on failed job insert

[jusstinas]

If connection argument is not passed to worker command, failed job insert to separate table is failing, because by generated entities connection field cannot be null.
I think this case it's logic to use default connection name.
Worst thing of this is that failed job is lost - job delete from regular jobs table is in a different transaction an run first. So it's deleted, another transaction with insert fails and it's lost.
Also after this error worker is running, but I think entity manager is closed and worker do nothing, because doesn't get any jobs from database.