Netflix, a long-time Java adopter, recently upgraded to Java 21. They are now harnessing new features such as generational ZGC and virtual threads to improve performance across their extensive microse

InfoQ is a leading online platform for software developers, architects, and technical leaders, providing news, articles, presentations, and interviews on a wide range of topics, including agile practices, DevOps, microservices, and emerging technologies. With a focus on quality content and expert insights, InfoQ helps professionals stay informed about the latest trends, best practices, and industry developments. Developers can learn from real-world experiences, gain  knowledge, and connect with peers in the global software community through InfoQ's diverse and engaging content.

InfoQ

Netflix has updated its Java stack to Java 21, leveraging features like generational ZGC and virtual threads to enhance performance across its microservices. However, they encountered challenges, particularly with virtual threads causing deadlock-like situations in SpringBoot applications, due to blocking operations and OS thread limitations. Diagnosis revealed that virtual threads couldn’t be scheduled due to locks held by other threads. Despite these issues, Netflix remains optimistic about virtual threads' future potential. Their real-time monitoring system, Atlas Streaming Eval, was crucial in identifying and diagnosing these issues.

Netflix Adopts Virtual Threads: A Case Study on Performance and Pitfalls