"By early afternoon on April 17, 2018, the contractors had determined that the root cause of the Tax Day outage was a cache overflow issue causing repeated warmstarts and had deployed a preventive script on the storage device that will monitor and correct the issue if the condition reoccurs. At 1:40 p.m., all IRS mainframes and databases were fully operational and ready to resume tax processing operations."

overflows... even happen to the best of us.

Props to the IRS for having the processes in place to handle. It took hours, sure, but at least it was ordered and the rest of us can benefit from this