Levels

Each one is a service that passes its tests and still fails in production. Pick one.

0 of 15 solved
01The last headlampThree customers get a confirmation for one item.ConcurrencyMediumUp next02Something went wrongThe whole product page errors whenever reviews are down.AsyncEasyNot started03Where's my email?The service restarts at peak, and some customers never get a confirmation email.AsyncEasyNot started04Back to Old StreetA customer's new address changes back, and loyalty points do not match orders.ConcurrencyMediumNot started05Have you tried restarting it?Memory climbs about 40 MB a day. A restart fixes it until tomorrow.MemoryEasyNot started06Still warming upWe added a cache last week, and database load did not drop.MemoryMediumNot started07Please holdWhen someone exports a report, every other page hangs.PerformanceMediumNot started08Did my payment go through?Some customers are billed twice for one order.ResilienceMediumNot started09Fast on stagingThe orders page is fast in testing and slow in production.PerformanceHardNot started10Everyone's an adminAfter one odd request, every user had admin rights.SecurityHardNot started11Off by a pennyDaily totals are off by a few cents.DataEasyNot started12Settings that change themselvesConfig values change with no deploy.DataEasyNot started13Pool's closedAfter a bad afternoon, every request waits for a database connection.MemoryMediumNot started14Back in five minutesA one-minute outage turned into twenty.ResilienceHardNot started15The 9:00 dropThe database falls over the moment a launch goes live.ConcurrencyHardNot started