One Missing Parameter Doubled Our Connection Pool Wait Time
java
dev.to
It was a Friday afternoon, the worst possible time for an incident, which is of course when it happened. Traffic was at its weekly peak, and our connection pool metrics started climbing in a way that didn't match the load. Requests weren't failing outright, they were just queuing, waiting longer and longer for a connection to free up. Nothing in the code had changed that week. Nothing in the infrastructure had changed either. The only thing that had changed was traffic volume, and the pool was