https://prodbuilds.com/blog Engineering write-ups from ProdBuilds, with tested code and measured results. en Sat, 10 Oct 2026 12:00:00 +0000 https://prodbuilds.com/blog/spring-boot-http-client-timeouts https://prodbuilds.com/blog/spring-boot-http-client-timeouts Sat, 10 Oct 2026 12:00:00 +0000 Spring Boot We pointed a Spring Boot app at a partner API that never answers. Defaults: offline in 10 seconds, no recovery. Timeouts fixed it; virtual threads and Apache HttpClient each had a surprise. https://prodbuilds.com/blog/spring-boot-scheduled-jobs-multiple-instances https://prodbuilds.com/blog/spring-boot-scheduled-jobs-multiple-instances Sat, 26 Sep 2026 12:00:00 +0000 Spring Boot Add a second instance and every @Scheduled job runs twice. We counted the duplicates across six setups: ShedLock fixes it, but only with two settings that are easy to get wrong. https://prodbuilds.com/blog/jobrunr-skipping-recurring-jobs https://prodbuilds.com/blog/jobrunr-skipping-recurring-jobs Sat, 26 Sep 2026 12:00:00 +0000 JobRunr Spring, Quartz and JobRunr ran the same job every minute, and JobRunr quietly lost a run. The log line that gave it away, the gap behind it and the 5.2.0 fix. https://prodbuilds.com/blog/firebase-auction-close-on-time https://prodbuilds.com/blog/firebase-auction-close-on-time Sat, 26 Sep 2026 12:00:00 +0000 Firebase Bids pile up in the last seconds, and a once-a-minute sweep closes auctions late. The pattern we recommend: the deadline in the bid transaction, one Cloud Task per auction and an idempotent close.