daily backups of websites are empty.

The daily backup of all my websites are failing. The database files are empty.

I can restore all files, but the mysqldump is empty.

fe: db_c1devoogdt_wp_2013-04-28_22-32.sql.gz has a size of 58 bytes, when I unzip the file, size is 0.

How can I determine what is wrong?

I have a lot of entries like this in my cron.log:

mysqldump: Got error: 1045: Access denied for user 'root'@'localhost' (using password: YES) when trying to connect

But where can I find where it gets his password ?

 

when I manually login with that password, I can logon, but...
A typically buggie thing, my password is something like this:

<?php

$clientdb_host = 'localhost';
$clientdb_user = 'root';
$clientdb_password = 'abcd20C&';

?>

Can it be that the & is causing problems ?

 

indeed that was the problem, this shouldn't happen anymore anno 2013