A year with jdk11 in production.

on YouTube ↗53m

" summary

Revolut runs OpenJDK 11 everywhere after a ~2 months to migrate effort that compiles and runs the whole toolchain on Java 11; build updates include moving Gradle to 5/6, updating libraries (jOOQ 3.11+, Mockito 2.20.1) and using Testcontainers plus Flyway for reliable tests. G1 becomes default GC, shows G1 uses more RSS and more aggressive memory use so teams lower Xmx/Xms and get faster OOM fail‑fast. Surprises: higher time precision, a DateTimeFormatter locale NPE, and a javac generics bug; Java Flight Recorder and Mission Control work on OpenJDK.

AI-written summary · about

" chapters (35)

1. 0:00Introduction
2. 0:35About Andrzej
3. 2:40Disclaimer
4. 3:50Who is on Java
5. 4:50About Revolut
6. 6:05About Spark Java
7. 7:35Why upgrade
8. 12:20Our culture
9. 14:35Why not Oracle JDK
10. 15:40How Java is released
11. 16:45What you require
12. 18:25Tools
13. 19:50Maven
14. 21:45Gradle Gradle
15. 22:35Mockito
16. 23:55Flyway
17. 24:45Java EE
18. 25:50Languages
19. 26:50Postgres
20. 27:45Dependencies
21. 28:55Bouncy Castle
22. 29:15Unified Login
23. 29:40Command Line Inspector
24. 30:10VM Options
25. 31:10Precision
26. 31:35Time
27. 32:15Nanotime
28. 33:10My recommendation
29. 33:55Formatter bug
30. 34:45No idea compiler
31. 37:15JDK 11 G1
32. 40:05Oracle Cloud
33. 41:30VAR
34. 43:05Next steps
35. 46:10Questions

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