Root Cause Analysis – CMS Upload Degradation
May 13, 2026
At 8:22 AM ET, automated alerting flagged unhealthy upload behavior in the production CMS. Initial investigation led to a server reboot; however, uploads continued to fail through 9:14 AM. The root cause was traced to an out-of-memory (OOM) condition on the upload endpoint, triggered by concurrent large-batch file uploads from multiple tenants. The OOM error caused the web server process to terminate and fail to recover on its own.
As an immediate fix, we updated the system configuration to automatically reboot on OOM errors and significantly increased the upload endpoint memory allocation. Stability was confirmed following load testing with large batches. In the next 3 weeks, we will address the architectural gap by extending load balancing and fault tolerance to the CMS upload path, bringing it in line with the rest of the Korbyt infrastructure.