Java 21 - Portland Java User Group 2023-10-24

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Java 21 Sean Sullivan Portland Java User Group October 24, 2023

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📍 Java 21 at Netflix 📍 Getting ready for Java 21

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Java 21 at Netflix ✅ Java 21 in production since October 6, 2023 ✅ mission critical application ✅ billions of requests

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Java 21 at Netflix October 6, 2023 😎

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Validating Java 21 🔩 Jenkins build ● unit tests ● functional tests ● smoke tests

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Validating Java 21 🐤 Canary testing ● “test in production” ● real production traffic ● long running canaries ● across multiple AWS regions

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“Use (unit, integration, smoke) testing and canary analysis to validate code before it is pushed to production” “we recommend the use of canary analysis. Canary analysis is an effective means to validate live traffic against new changes to a service” 📚 Netflix Tech blog

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🐤 Canary analysis at Netflix

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🐤 Canary analysis at Netflix “A canary release is a technique to reduce the risk from deploying a new version of software into production”

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🐤 Canary analysis at Netflix “A new version of software, referred to as the canary, is deployed to a small subset of users alongside the stable running version.” “Traffic is split between these two versions such that a portion of incoming requests are diverted to the canary.”

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🐤 Canary analysis at Netflix

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🐤 Canary analysis at Netflix “The quality of the canary version is assessed by comparing key metrics that describe the behavior of the old and new versions. ”

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🐤 Canary analysis at Netflix “If there is significant degradation in these metrics, the canary is aborted and all of the traffic is routed to the stable version in an effort to minimize the impact”

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🐤 Canary analysis report ● CPU utilization ● Memory ● Garbage collection ● Requests per second ● Error rate ● Log diff

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🚧 Getting ready for Java 21 🚨 GitHub Actions 🚨 Gradle 🚨 Lombok 🚨 Netty

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🚨 GitHub Actions https://github.com/qos-ch/slf4j/pull/360

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🚨 Gradle https://github.com/sullis/microbenchmarks-java/pull/6

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🚨 Gradle

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🚨 Gradle

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🚨 Gradle

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🚨 Lombok https://projectlombok.org/changelog

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🚨 Netty Java 21 + Netty 4.1.98 + Epoll native transport

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🚨 Netty https://netty.io/news/index.html

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🎆 Final thoughts Use automated canary analysis to validate changes

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The End