Worked on the Caideyipi/iotdb repository to deliver two core backend features focused on concurrency and memory management using Java. Developed a thread-safe memory allocation and release mechanism in AtomicLongMemoryBlock, leveraging concurrent programming techniques such as CAS-based release and comprehensive unit testing to ensure stability under high-concurrency workloads. Enhanced the Coordinator component by introducing a queryId for improved tracking and resource allocation, supporting better observability and scalability. Emphasized code quality and testing coverage throughout the process, resulting in more predictable performance and easier capacity planning for the system. No bugs were fixed during this period, with efforts concentrated on new feature development.