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Large language model (LLM) applications in cloud root cause analysis (RCA) have been actively explored recently. However, current methods are still reliant on manual workflow settings and do not unleash LLMs' decision-making and environment…

Software Engineering · Computer Science 2024-08-05 Zefan Wang , Zichuan Liu , Yingying Zhang , Aoxiao Zhong , Jihong Wang , Fengbin Yin , Lunting Fan , Lingfei Wu , Qingsong Wen

Ensuring the reliability and availability of complex networked services demands effective root cause analysis (RCA) across cloud environments, data centers, and on-premises networks. Traditional RCA methods, which involve manual inspection…

Networking and Internet Architecture · Computer Science 2025-07-08 Alexander Shan , Jasleen Kaur , Rahul Singh , Tarun Banka , Raj Yavatkar , T. Sridhar

Implementing large language models (LLMs)-driven root cause analysis (RCA) in cloud-native systems has become a key topic of modern software operations and maintenance. However, existing LLM-based approaches face three key challenges:…

Artificial Intelligence · Computer Science 2025-11-06 Xiao Zhang , Qi Wang , Mingyi Li , Yuan Yuan , Mengbai Xiao , Fuzhen Zhuang , Dongxiao Yu

Root cause analysis (RCA) in microservices is challenging due to (i) noisy and heterogeneous multimodal observability (metrics, logs, traces), (ii) cascading failure propagation that amplifies downstream symptoms, and (iii) non-stationary…

Artificial Intelligence · Computer Science 2026-05-18 Junle Wang , Xingchuang Liao , Wenjun Wu

As contemporary microservice systems become increasingly popular and complex-often comprising hundreds or even thousands of fine-grained, interdependent subsystems-they are experiencing more frequent failures. Ensuring system reliability…

Software Engineering · Computer Science 2026-01-07 Lingzhe Zhang , Tong Jia , Yunpeng Zhai , Leyi Pan , Chiming Duan , Minghua He , Mengxi Jia , Ying Li

Root cause analysis (RCA) is essential for diagnosing failures within complex software systems to ensure system reliability. The highly distributed and interdependent nature of modern cloud-based systems often complicates RCA efforts,…

Software Engineering · Computer Science 2026-02-02 Evelien Riddell , James Riddell , Gengyi Sun , Michał Antkiewicz , Krzysztof Czarnecki

In real-world scenarios, due to the highly decoupled and flexible nature of microservices, it poses greater challenges to system reliability. The more frequent occurrence of incidents has created a demand for Root Cause Analysis(RCA)…

Software Engineering · Computer Science 2025-07-31 Rui Ren

Localizing the root cause of network faults is crucial to network operation and maintenance. However, due to the complicated network architectures and wireless environments, as well as limited labeled data, accurately localizing the true…

Machine Learning · Computer Science 2022-03-08 Chaoli Zhang , Zhiqiang Zhou , Yingying Zhang , Linxiao Yang , Kai He , Qingsong Wen , Liang Sun

Root Cause Analysis (RCA) in mobile networks remains a challenging task due to the need for interpretability, domain expertise, and causal reasoning. In this work, we propose a lightweight framework that leverages Large Language Models…

Artificial Intelligence · Computer Science 2025-07-30 Mohamed Sana , Nicola Piovesan , Antonio De Domenico , Yibin Kang , Haozhe Zhang , Merouane Debbah , Fadhel Ayed

Microservice systems (MSS) have become a predominant architectural style for cloud services. Yet the community still lacks high-quality, publicly available datasets for anomaly detection (AD) and root cause analysis (RCA) in MSS. Most…

Software Engineering · Computer Science 2026-02-02 Ke Ping , Hamza Bin Mazhar , Yuqing Wang , Ying Song , Mika V. Mäntylä

The dynamics and complexity of cloud-native systems present significant challenges for Root Cause Analysis (RCA). While causality-based RCA methods have shown significant progress in recent years, their practical adoption is fundamentally…

Software Engineering · Computer Science 2026-03-03 Shuai Liang , Pengfei Chen , Bozhe Tian , Gou Tan , Maohong Xu , Youjun Qu , Yahui Zhao , Yiduo Shang , Chongkang Tan

Failures in large-scale cloud systems incur substantial financial losses, making automated Root Cause Analysis (RCA) essential for operational stability. Recent efforts leverage Large Language Model (LLM) agents to automate this task, yet…

Artificial Intelligence · Computer Science 2026-03-05 Taeyoon Kim , Woohyeok Park , Hoyeong Yun , Kyungyong Lee

LLM-based root cause analysis (RCA) agents have recently emerged as a promising paradigm for incident diagnosis in microservice AIOps. However, their reliability remains fragile: an error in early evidence collection, hypothesis…

Artificial Intelligence · Computer Science 2026-05-18 Junle Wang , Xingchuang Liao , Wenjun Wu

Large-scale telecom and datacenter infrastructures rely on multi-layered service and resource models, where failures propagate across physical and logical components and affect multiple customers. Traditional approaches to root cause…

Artificial Intelligence · Computer Science 2026-01-13 Nicolas Tacheny

Root Cause Analysis (RCA) plays a pivotal role in the incident diagnosis process for cloud services, requiring on-call engineers to identify the primary issues and implement corrective actions to prevent future recurrences. Improving the…

Computation and Language · Computer Science 2024-01-26 Xuchao Zhang , Supriyo Ghosh , Chetan Bansal , Rujia Wang , Minghua Ma , Yu Kang , Saravan Rajmohan

Existing multi-source root cause analysis (RCA) methods for microservice systems assume all services have traces to construct a service call graph. However, this assumption is not practical as microservice systems evolve rapidly and may…

Software Engineering · Computer Science 2026-04-21 Luan Pham , Huong Ha , Xiuzhen Zhang , Hongyu Zhang

Root cause analysis (RCA) for incidents in large-scale cloud systems is a complex, knowledge-intensive task that often requires significant manual effort from on-call engineers (OCEs). Improving RCA is vital for accelerating the incident…

Detecting failures and identifying their root causes promptly and accurately is crucial for ensuring the availability of microservice systems. A typical failure troubleshooting pipeline for microservices consists of two phases: anomaly…

Software Engineering · Computer Science 2024-05-16 Luan Pham , Huong Ha , Hongyu Zhang

The momentum gained by microservices and cloud-native software architecture pushed nowadays enterprise IT towards multi-service applications. The proliferation of services and service interactions within applications, often consisting of…

Software Engineering · Computer Science 2021-05-27 Jacopo Soldani , Antonio Brogi

Microservice architecture has become a popular architecture adopted by many cloud applications. However, identifying the root cause of a failure in microservice systems is still a challenging and time-consuming task. In recent years,…

Software Engineering · Computer Science 2024-09-10 Luan Pham , Huong Ha , Hongyu Zhang