Java Bean Bag

  🧩 Introduction Setting up MongoDB with OIDC authentication in a production-grade Spring Boot app sounds simple — until reality strikes. 😅 This post covers two specific issues I faced when integrating MongoDB v8 with Spring Boot 3.3.6 , and deploying the app via Terraform to Cloud Run . If you’re planning the same, ame, save yourself some debugging time and read on. 👇 🐛 Issue #1: MongoDB Driver Compatibility – “Unsupported authMechanism: MONGODB-OIDC” 🔥 The Problem: After upgrading to MongoDB v8 , my app started throwing this error: Unsupported authMechanism: MONGODB-OIDC Turns out, the default MongoDB driver version (5.0.1) pulled in by Spring Boot 3.3.6 isn’t compatible with MongoDB v8, especially when using OIDC authentication . Turns out, the default MongoDB driver version (5.0.1) pulled in by Spring Boot 3.3.6 isn’t compatible with MongoDB v8, especially when using OIDC authentication . ✅ The Fix: Manually specify compatible driver versions ( 5.2.1 or abo...