At approximately 5:00 p.m. EST on June 30, 2015, we began experiencing a service disruption with the Pardot application. The cause of the disruption was an issue in the queueing system that powers automation rules and dynamic lists. When this issue occurred, the Pardot application became inaccessible to users and displayed an error message. During this time, live landing pages and forms hosted in Pardot may have also displayed an error message. Tracked email links were also affected and may have resulted in an error upon click.
At approximately 5:10 p.m. EST, we temporarily disabled background processing (emails, imports, CRM syncing, automations) and restarted our servers in order to restore service. From approximately 5:20 p.m. EST to 5:30 p.m. EST, access to the Pardot application and hosted forms and landing pages was intermittent.
To prevent this moving forward, we will first be fixing a bug, which contributed to the issue in our queueing infrastructure. Additionally, we will be increasing our monitoring to proactively identify similar issues more quickly in the future. Lastly, new higher-capacity hardware is being provisioned in order to reduce the chance for the same issue to recur.
We apologize for any trouble caused and appreciate your patience while we resolved this incident.
Zach Bailey, Director of Engineering