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Tackling a Mysterious JVM Safepoint Issue: A Journey from Problem to Solution
·1004 words·5 mins
A deep dive into diagnosing and resolving a production JVM issue where applications would freeze during hourly log synchronization tasks. We explore safepoint analysis, JVM log output blocking, asynchronous logging implementation, and WebFlux optimization to achieve a complete solution.
Solving JVM Safepoint Delays: A Journey from EFS Integration to Async Logging
·970 words·5 mins
An in-depth investigation into mysterious JVM safepoint delays after upgrading to Java 17 and implementing centralized log collection with AWS EFS. We discovered how file I/O blocking during log output can freeze entire JVM processes and solved it using async logging and proper WebFlux implementation.
Troubleshooting Memory Issues After Spring Boot Upgrade: A Deep Dive into ResolvableType Object Creation
·1180 words·6 mins
An investigation into excessive memory allocation and YoungGC frequency after upgrading to Spring Boot 2.4.6 + Spring Cloud 2020.0.x, revealing how BeanUtils.copyProperties creates massive ResolvableType objects without caching in Spring 5.3.x versions.
OpenJDK JVM Deep Dive: A Comprehensive Guide to Thread Local Allocation Buffers
·9380 words·45 mins
A deep dive into JVM’s Thread Local Allocation Buffer (TLAB) mechanism, covering design principles, implementation details, performance optimization, and source code analysis. Learn how TLAB improves memory allocation efficiency in multi-threaded environments and master TLAB tuning techniques.