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Logs provide users with useful insights to help with a variety of development and operations tasks. The problem is that logs are often unstructured, making their analysis a complex task. This is mainly due to the lack of guidelines and best…

Software Engineering · Computer Science 2021-11-01 Issam Sedki , Abdelwahab Hamou-Lhadj , Otmane Ait-Mohamed

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 are semi-structured text files that represent software's execution paths and states during its run-time. Therefore, detecting anomalies in software logs reflect anomalies in the software's execution path or state. So, it has become a…

Software Engineering · Computer Science 2024-08-06 Shayan Hashemi , Mika Mäntylä

Log anomaly detection is crucial for preserving the security of operating systems. Depending on the source of log data collection, various information is recorded in logs that can be considered log modalities. In light of this intuition,…

Machine Learning · Computer Science 2026-01-01 Mohammad Nasirzadeh , Jafar Tahmoresnezhad , Parviz Rashidi-Khazaee

Logs are semi-structured text generated by logging statements in software source code. In recent decades, software logs have become imperative in the reliability assurance mechanism of many software systems because they are often the only…

Software Engineering · Computer Science 2021-06-02 Shilin He , Pinjia He , Zhuangbin Chen , Tianyi Yang , Yuxin Su , Michael R. Lyu

Log anomaly detection is a key component in the field of artificial intelligence for IT operations (AIOps). Considering log data of variant domains, retraining the whole network for unknown domains is inefficient in real industrial…

Machine Learning · Computer Science 2022-01-19 Hongcheng Guo , Xingyu Lin , Jian Yang , Yi Zhuang , Jiaqi Bai , Tieqiao Zheng , Bo Zhang , Zhoujun Li

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

Log files record computational events that reflect system state and behavior, making them a primary source of operational insights in modern computer systems. Automated anomaly detection on logs is therefore critical, yet most established…

Machine Learning · Computer Science 2026-02-04 Simon Dietz , Kai Klede , An Nguyen , Bjoern M Eskofier

Event logs are widely used to record the status of high-tech systems, making log anomaly detection important for monitoring those systems. Most existing log anomaly detection methods take a log event count matrix or log event sequences as…

Software Engineering · Computer Science 2024-01-25 Zhong Li , Jiayang Shi , Matthijs van Leeuwen

Logs play a crucial role in system monitoring and debugging by recording valuable system information, including events and states. Although various methods have been proposed to detect anomalies in log sequences, they often overlook the…

Machine Learning · Computer Science 2023-09-13 Yufei Li , Yanchi Liu , Haoyu Wang , Zhengzhang Chen , Wei Cheng , Yuncong Chen , Wenchao Yu , Haifeng Chen , Cong Liu

Network log data analysis plays a critical role in detecting security threats and operational anomalies. Traditional log analysis methods for anomaly detection and root cause analysis rely heavily on expert knowledge or fully supervised…

Networking and Internet Architecture · Computer Science 2025-09-09 Xuanhao Luo , Shivesh Madan Nath Jha , Akruti Sinha , Zhizhen Li , Yuchen Liu

Logs constitute a form of evidence signaling the operational status of software systems. Automated log anomaly detection is crucial for ensuring the reliability of modern software systems. However, existing approaches face significant…

Logs are imperative in the development and maintenance process of many software systems. They record detailed runtime information that allows developers and support engineers to monitor their systems and dissect anomalous behaviors and…

Software Engineering · Computer Science 2019-01-07 Jieming Zhu , Shilin He , Jinyang Liu , Pinjia He , Qi Xie , Zibin Zheng , Michael R. Lyu

Identification of anomalous events within system logs constitutes a pivotal element within the frame- work of cybersecurity defense strategies. However, this process faces numerous challenges, including the management of substantial data…

Cryptography and Security · Computer Science 2025-10-21 Zeng Zhang , Wenjie Yin , Xiaoqi Li

Log analysis is an important technique that engineers use for troubleshooting faults of large-scale service-oriented systems. In this study, we propose a novel semi-supervised log-based anomaly detection approach, LogDP, which utilizes the…

Software Engineering · Computer Science 2021-10-06 Yongzheng Xie , Hongyu Zhang , Bo Zhang , Muhammad Ali Babar , Sha Lu

Effective anomaly detection from logs is crucial for enhancing cybersecurity defenses by enabling the early identification of threats. Despite advances in anomaly detection, existing systems often fall short in areas such as post-detection…

Cryptography and Security · Computer Science 2025-04-04 Zhuoran Tan , Qiyuan Wang , Christos Anagnostopoulos , Shameem P. Parambath , Jeremy Singer , Sam Temple

Log-system is an important mechanism for recording the runtime status and events of Web service systems, and anomaly detection in logs is an effective method of detecting problems. However, manual anomaly detection in logs is inefficient,…

Machine Learning · Computer Science 2024-11-26 Jiawei Lu , Chengrong Wu

Provenance graphs model causal system-level interactions from logs, enabling anomaly detectors to learn normal behavior and detect deviations as attacks. However, existing approaches rely on brittle, manually engineered rules to build…

Cryptography and Security · Computer Science 2026-03-19 Kushankur Ghosh , Mehar Klair , Kian Kyars , Euijin Choo , Jörg Sander

Log data are generated from logging statements in the source code, providing insights into the execution processes of software applications and systems. State-of-the-art log-based anomaly detection approaches typically leverage deep…

Software Engineering · Computer Science 2025-03-12 Xingfang Wu , Heng Li , Foutse Khomh

With the growth of online services, IoT devices, and DevOps-oriented software development, software log anomaly detection is becoming increasingly important. Prior works mainly follow a traditional four-staged architecture (Preprocessor,…

Software Engineering · Computer Science 2024-08-06 Shayan Hashemi , Mika Mäntylä