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Large Language Model (LLM)-based agents increasingly rely on APIs to operate complex web applications, but rapid evolution often leads to incomplete or inconsistent API documentation. Existing work falls into two categories: (1) static,…

Software Engineering · Computer Science 2026-03-26 Yanjing Yang , Chenxing Zhong , Ke Han , Zeru Cheng , Jinwei Xu , Xin Zhou , He Zhang , Bohan Liu

System logs are some of the most important information for the maintenance of software systems, which have become larger and more complex in recent years. The goal of log-based anomaly detection is to automatically detect system anomalies…

Machine Learning · Computer Science 2024-02-19 Yuuki Yamanaka , Tomokatsu Takahashi , Takuya Minami , Yoshiaki Nakajima

The detection of anomalies is essential mining task for the security and reliability in computer systems. Logs are a common and major data source for anomaly detection methods in almost every computer system. They collect a range of…

Machine Learning · Computer Science 2020-08-24 Sasho Nedelkoski , Jasmin Bogatinovski , Alexander Acker , Jorge Cardoso , Odej Kao

As the IT industry advances, system log data becomes increasingly crucial. Many computer systems rely on log texts for management due to restricted access to source code. The need for log anomaly detection is growing, especially in…

Machine Learning · Computer Science 2023-11-10 Gunho No , Yukyung Lee , Hyeongwon Kang , Pilsung Kang

Logs serve as a primary source of information for engineers to diagnose failures in large-scale online service systems. Log parsing, which extracts structured events from massive unstructured log data, is a critical first step for…

Software Engineering · Computer Science 2026-03-13 Jinrui Sun , Tong Jia , Minghua He , Ying Li

Anomaly detection is a crucial and challenging subject that has been studied within diverse research areas. In this work, we explore the task of log anomaly detection (especially computer system logs and user behavior logs) by analyzing…

Machine Learning · Computer Science 2021-01-08 Yicheng Guo , Yujin Wen , Congwei Jiang , Yixin Lian , Yi Wan

Logs have been an imperative resource to ensure the reliability and continuity of many software systems, especially large-scale distributed systems. They faithfully record runtime information to facilitate system troubleshooting and…

Software Engineering · Computer Science 2022-01-12 Zhuangbin Chen , Jinyang Liu , Wenwei Gu , Yuxin Su , Michael R. Lyu

Modern software development and operations rely on monitoring to understand how systems behave in production. The data provided by application logs and runtime environment are essential to detect and diagnose undesired behavior and improve…

Software Engineering · Computer Science 2021-03-08 Jeanderson Barros Cândido , Maurício Finavaro Aniche , Arie van Deursen

Log parsing is a fundamental step for automated log analysis, which transforms raw log messages into structured formats. Existing syntax-based parsers struggle with complex logs because they lack semantic reasoning ability. Emerging…

Software Engineering · Computer Science 2026-05-26 Shiwen Shan , Yintong Huo , Minxing Wang , Zhiying Wu , Yuxin Su , Zibin Zheng

Modern distributed systems produce massive, heterogeneous logs essential for reliability, security, and anomaly detection. Converting these free-form messages into structured templates (log parsing) is challenging due to evolving formats…

Software Engineering · Computer Science 2026-04-23 Amir Shetaia , Sean Kauffman

In the last decade, an impressive increase in software adaptions has led to a surge in log data production, making manual log analysis impractical and establishing the necessity for automated methods. Conversely, most automated analysis…

Software Engineering · Computer Science 2025-11-19 Shayan Hashemi , Mika Mäntylä

Log analysis is crucial for monitoring system health and diagnosing failures in complex systems. Recent advances in large language models (LLMs) offer new opportunities for automated log analysis, leveraging their reasoning capabilities to…

Artificial Intelligence · Computer Science 2025-09-30 Lipeng Ma , Yixuan Li , Weidong Yang , Mingjie Zhou , Xinyi Liu , Ben Fei , Shuhao Li , Xiaoyan Sun , Sihang Jiang , Yanghua Xiao

Event logs are widely used for anomaly detection and prediction in complex systems. Existing log-based anomaly detection methods usually consist of four main steps: log collection, log parsing, feature extraction, and anomaly detection,…

Machine Learning · Computer Science 2022-12-20 Zhong Li , Matthijs van Leeuwen

Log parsing, the process of converting raw log messages into structured formats, is an important initial step for automated analysis of logs of large-scale software systems. Traditional log parsers often rely on heuristics or handcrafted…

Software Engineering · Computer Science 2024-06-13 Yi Xiao , Van-Hoang Le , Hongyu Zhang

Logs provide first-hand information for engineers to diagnose failures in large-scale online service systems. Log parsing, which transforms semi-structured raw log messages into structured data, is a prerequisite of automated log analysis…

Software Engineering · Computer Science 2022-02-15 Yudong Liu , Xu Zhang , Shilin He , Hongyu Zhang , Liqun Li , Yu Kang , Yong Xu , Minghua Ma , Qingwei Lin , Yingnong Dang , Saravan Rajmohan , Dongmei Zhang

Most enterprise applications use logging as a mechanism to diagnose anomalies, which could help with reducing system downtime. Anomaly detection using software execution logs has been explored in several prior studies, using both classical…

Machine Learning · Computer Science 2023-11-01 Nadun Wijesinghe , Hadi Hemmati

The scarcity of high-quality public log datasets has become a critical bottleneck in advancing log-based anomaly detection techniques. Current datasets exhibit three fundamental limitations: (1) incomplete event coverage, (2) artificial…

Software Engineering · Computer Science 2025-04-17 Xinyu Li , Yingtong Huo , Chenxi Mao , Shiwen Shan , Yuxin Su , Dan Li , Zibin Zheng

Log anomaly detection, which is critical for identifying system failures and preempting security breaches, detects irregular patterns within large volumes of log data, and impacts domains such as service reliability, performance…

Software Engineering · Computer Science 2025-11-19 Shenglin Zhang , Ziang Chen , Zijing Que , Yilun Liu , Yongqian Sun , Sicheng Wei , Dan Pei , Hailin Li

Logs, being run-time information automatically generated by software, record system events and activities with their timestamps. Before obtaining more insights into the run-time status of the software, a fundamental step of log analysis,…

Software Engineering · Computer Science 2023-02-07 Yintong Huo , Yuxin Su , Cheryl Lee , Michael R. Lyu

As software systems grow increasingly intricate, the precise detection of anomalies have become both essential and challenging. Current log-based anomaly detection methods depend heavily on vast amounts of log data leading to inefficient…

Software Engineering · Computer Science 2024-09-17 Lingzhe Zhang , Tong Jia , Kangjin Wang , Mengxi Jia , Yang Yong , Ying Li