Staff Engineering on João Vieira (JV) https://joaovieira.ca/tags/staff-engineering/ Recent content in Staff Engineering on João Vieira (JV) João Vieira (JV) https://joaovieira.ca/profile.jpeg https://joaovieira.ca/profile.jpeg Hugo en-us Wed, 03 Jun 2026 22:30:00 -0800 MongoDB Server Timeout: When Client Timeouts Aren't Enough https://joaovieira.ca/mongodb-server-timeout/ Wed, 03 Jun 2026 22:30:00 -0800 https://joaovieira.ca/mongodb-server-timeout/ Discovered why a query ran for 14 hours on MongoDB server despite client timeout: missing server-side timeout configuration. Solutions for MongoClientSettings. JPA Delete Queries and Optimistic Locking: Why Batching Fails https://joaovieira.ca/jpa-delete-all-query-not-batching/ Thu, 22 Jan 2026 22:30:00 -0800 https://joaovieira.ca/jpa-delete-all-query-not-batching/ Discovered why JPA deleteAll wasn’t batching: @Version fields force entity loading for optimistic locking. The fix: explicit @Query annotation. Fixing Tracing Propagation in Spring WebFlux: A One-Line Solution https://joaovieira.ca/micrometer-tracing-spring-webflux-propagation/ Mon, 27 Jan 2025 17:15:24 -0800 https://joaovieira.ca/micrometer-tracing-spring-webflux-propagation/ Upgrading to Spring Boot 3.2 revealed tracing issues in a WebFlux service. A single line of code fixed broken span propagation and improved debugging. 90% of distributed traces observability gone after Spring Boot upgrade https://joaovieira.ca/spring-boot-3-tracing-sampling-default-probability/ Wed, 17 Jul 2024 08:44:24 -0700 https://joaovieira.ca/spring-boot-3-tracing-sampling-default-probability/ After upgrading Spring Boot version to 3.3.1 we noticed that 90% of our distributed tracing in our observability tool were gone. In this post we tell the story How upgrading from Spring Boot 3.2.5 to 3.3.1 broke our object mapper https://joaovieira.ca/spring-boot-3-3-1-jackson-jdk8module/ Mon, 15 Jul 2024 21:23:24 -0700 https://joaovieira.ca/spring-boot-3-3-1-jackson-jdk8module/ After upgrading Spring Boot from version 3.2.5 to 3.3.1 we started to have a serialization issue with the Optional class. Check how to fix it in this post Learnings from the book The Staff Engineer's Path https://joaovieira.ca/learnings-book-the-staff-enginners-path/ Tue, 16 May 2023 20:40:35 -0700 https://joaovieira.ca/learnings-book-the-staff-enginners-path/ These are my learnings from the book The Staff Engineer’s Path: A Guide for Individual Contributors Navigating Growth and Change written by Tanya Reilly