6. US and Canada : Blackout for 50 Million due to Race Condition Bug
As per the sources of PC Authority, (PCAuthority, 2016), on August 14, 2003, a blackout across eight US states and Canada affected 50 million people. “A race condition bug”, a situation when two separate threads of a single operation uses the same code element, was culprit behind this software flaw. This crashed a system without proper synchronization and resulted 256 power plants offline. This failed primary server within 30 minutes due to unprocessed events queue. Backup system also failed within few minutes.
FirstEnergy’s computerized Energy Management System is known as the direct cause for the blackout that cut off electricity to 50 million people in 8 states and Canada.