Power distribution units (PDUs) provide power outlets to racks in server rooms and data centers.
To eliminate a single point of failure, redundant PDUs should be plugged into separate circuits.
To extend this point, redundant server power supplies should each plug into separate PDUs.
Data centers normally have alternate sources or providers of power, such as diesel generators, in the case of a power outage.
Because many different types of items can draw power from PDUs, you should check your PDU's rating to ensure that your equipment doesn't draw more power than the PDU's load capacity can accommodate.

Adware on the users' machine is a large assumption. If everyone is affected it's unlikely that everyone has adware, and more likely that the server has a virus slowing it down.
The server most likely got the virus from open ports i.e. misconfigured firewall.

Java applications can become unstable when memory is not released properly, causing increasing heap usage, degraded performance, and eventual crashes.