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Log parsing transforms log messages into structured formats, serving as the prerequisite step for various log analysis tasks. Although a variety of log parsing approaches have been proposed, their performance on complicated log data remains…

Software Engineering · Computer Science 2024-03-25 Zhihan Jiang , Jinyang Liu , Zhuangbin Chen , Yichen Li , Junjie Huang , Yintong Huo , Pinjia He , Jiazhen Gu , Michael R. Lyu

Background: Log messages provide valuable information about the status of software systems. This information is provided in an unstructured fashion and automated approaches are applied to extract relevant parameters. To ease this process,…

Software Engineering · Computer Science 2024-09-05 Merve Astekin , Max Hort , Leon Moonen

Automated log analysis is crucial to ensure high availability and reliability of complex systems. The advent of LLMs in NLP has ushered in a new era of language model-driven automated log analysis, garnering significant interest. Within…

Software Engineering · Computer Science 2025-01-22 Lipeng Ma , Weidong Yang , Yixuan Li , Ben Fei , Mingjie Zhou , Shuhao Li , Sihang Jiang , Bo Xu , Yanghua Xiao

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

Logs are an essential source of information for people to understand the running status of a software system. Due to the evolving modern software architecture and maintenance methods, more research efforts have been devoted to automated log…

Software Engineering · Computer Science 2024-04-09 Xingfang Wu , Heng Li , Foutse Khomh

Logs generated by large-scale software systems provide crucial information for engineers to understand the system status and diagnose problems of the systems. Log parsing, which converts raw log messages into structured data, is the first…

Software Engineering · Computer Science 2023-02-16 Van-Hoang Le , Hongyu Zhang

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

Automatic log analysis is essential for the efficient Operation and Maintenance (O&M) of software systems, providing critical insights into system behaviors. However, existing approaches mostly treat log analysis as training a model to…

Software Engineering · Computer Science 2025-01-10 Yilun Liu , Yuhe Ji , Shimin Tao , Minggui He , Weibin Meng , Shenglin Zhang , Yongqian Sun , Yuming Xie , Boxing Chen , Hao Yang

Logs play a critical role in providing essential information for system monitoring and troubleshooting. Recently, with the success of pre-trained language models (PLMs) and large language models (LLMs) in natural language processing (NLP),…

Software Engineering · Computer Science 2025-02-03 Lipeng Ma , Weidong Yang , Sihang Jiang , Ben Fei , Mingjie Zhou , Shuhao Li , Mingyu Zhao , Bo Xu , Yanghua Xiao

Log analysis is crucial for ensuring the orderly and stable operation of information systems, particularly in the field of Artificial Intelligence for IT Operations (AIOps). Large Language Models (LLMs) have demonstrated significant…

Computation and Language · Computer Science 2024-07-03 Tianyu Cui , Shiyu Ma , Ziang Chen , Tong Xiao , Shimin Tao , Yilun Liu , Shenglin Zhang , Duoming Lin , Changchang Liu , Yuzhe Cai , Weibin Meng , Yongqian Sun , Dan Pei

Log analysis represents a critical sub-domain within AI applications that facilitates automatic approaches to fault and error management of large-scaled software systems, saving labors of traditional manual methods. While existing solutions…

Computation and Language · Computer Science 2025-08-27 Yuhe Ji , Yilun Liu , Feiyu Yao , Minggui He , Shimin Tao , Xiaofeng Zhao , Su Chang , Xinhua Yang , Weibin Meng , Yuming Xie , Boxing Chen , Shenglin Zhang , Yongqian Sun

Log parsing is a fundamental step in log analysis, partitioning raw logs into constant templates and dynamic variables. While recent semantic-based parsers leveraging Large Language Models (LLMs) exhibit superior generalizability over…

Software Engineering · Computer Science 2026-03-31 Minxing Wang , Yintong Huo

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

Software systems often record important runtime information in logs to help with troubleshooting. Log-based anomaly detection has become a key research area that aims to identify system issues through log data, ultimately enhancing the…

Software Engineering · Computer Science 2025-04-15 Wei Guan , Jian Cao , Shiyou Qian , Jianqi Gao , Chun Ouyang

Automated logging statement generation supports developers in documenting critical software runtime behavior. Given the great success in natural language generation and programming language comprehension, large language models (LLMs) might…

Software Engineering · Computer Science 2024-04-02 Yichen Li , Yintong Huo , Zhihan Jiang , Renyi Zhong , Pinjia He , Yuxin Su , Lionel Briand , Michael R. Lyu

Log parsing serves as an essential prerequisite for various log analysis tasks. Recent advancements in this field have improved parsing accuracy by leveraging the semantics in logs through fine-tuning large language models (LLMs) or…

Software Engineering · Computer Science 2024-08-09 Junjie Huang , Zhihan Jiang , Zhuangbin Chen , Michael R. Lyu

Log parsing transforms log messages into structured formats, serving as a crucial step for log analysis. Despite a variety of log parsers that have been proposed, their performance on evolving log data remains unsatisfactory due to reliance…

Software Engineering · Computer Science 2025-02-04 Yifan Wu , Siyu Yu , Ying Li

Due to the sheer size of software logs, developers rely on automated log analysis. Log parsing, which parses semi-structured logs into a structured format, is a prerequisite of automated log analysis. However, existing log parsers are…

Software Engineering · Computer Science 2026-03-16 Yifan Wu , Bingxu Chai , Siyu Yu , Ying Li , Pinjia He , Wei Jiang , Jianguo Li

Log statements capture critical information for software maintenance activities such as testing, debugging, and failure analysis. Because of this importance, developers must carefully design log statements, which requires significant…

Software Engineering · Computer Science 2026-05-26 Kazuki Kusama , Honglin Shu , Masanari Kondo , Yasutaka Kamei

Today's high-performance computing (HPC) systems are heavily instrumented, generating logs containing information about abnormal events, such as critical conditions, faults, errors and failures, system resource utilization, and about the…

Distributed, Parallel, and Cluster Computing · Computer Science 2017-08-24 Byung H. Park , Saurabh Hukerikar , Ryan Adamson , Christian Engelmann