Overview
Investigated and resolved memory leaks and performance issues affecting Java microservices, significantly improving system stability.
Investigation Approach
- Heap Dump Analysis: Analyzed heap dumps to identify memory leaks
- Profiling: Runtime analysis of memory allocation
- GC Analysis: Examined garbage collection patterns
- Thread Dumps: Identified thread leaks and deadlocks
- Metrics: Established JVM monitoring dashboards
Issues Identified & Fixed
- Unclosed resources and connections
- ThreadLocal variables not cleaned up
- Event listeners without deregistration
- Inefficient garbage collection configuration
- Suboptimal JVM flags