On July 31st, 2026, an issue affected applications running in the Development Stage in Europe Central (Frankfurt). Applications experienced extended delays (2–3 minutes) and timeout errors when starting up from an idle state.

The issue lasted approximately a few hours and was detected through customer reports and platform monitoring. During this time, several customers in the region reported difficulties launching their applications in the Development Stage's Runtime.

Our investigation identified a memory issue in a critical component responsible for automatically scaling applications based on incoming traffic. This component was consuming excessive memory and restarting repeatedly, which prevented applications from scaling up when first accessed. Our team immediately implemented an operational workaround by increasing resource limits for this component. This mitigation immediately allowed applications to scale up as expected.

In parallel, we developed a permanent code fix to address the root cause and deployed it on August 7th. The system remained stable, with no new occurrences during and after the deployment of the permanent fix.

To prevent similar issues, OutSystems is improving how we monitor and validate infrastructure configuration to catch memory and resource issues earlier, and we are enhancing our automated scaling components to handle traffic pattern changes more gracefully.

We apologise for any disruption caused and thank you for your patience.