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cs.SE2026
Beyond Fault Localization: A Trajectory-Level Study of LLM Agents for Microservice Root Cause Analysis
Qisheng Lu, Aoyang Fang, Junjielong Xu +5
Automated microservice root cause analysis (RCA) is usually evaluated by whether the final answer localizes the fault source. This is insufficient for on-call site reliability engi…
cs.SE2026
Gleaner: A Semantically-Rich and Efficient Online Sampler for Microservice Diagnostics
Yifan Yang, Aoyang FANG, Songhan Zhang +1
Distributed tracing in microservices is critical for diagnostics but generates overwhelming data volumes, necessitating intelligent sampling. To maximize fidelity, state-of-the-art…
cs.SE2025
DynaCausal: Dynamic Causality-Aware Root Cause Analysis for Distributed Microservices
Songhan Zhang, Aoyang Fang, Yifan Yang +3
Cloud-native microservices enable rapid iteration and scalable deployment but also create complex, fast-evolving dependencies that challenge reliable diagnosis. Existing root cause…