Security - We will get there

I have my servers send out log analysis reports to my web application hosted by a hosting provider. This had been working fine for several years until last month. All my reports were not received after Jan 28. Here is how I get it figured out. It could be the backend database is full. This was my first thought as I haven't backup and clean the db for a while. But it's not the case when I logged into the hosting server and found there was enought space.