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LogRCA: Log-based Root Cause Analysis for Distributed Services (2405.13599v1)

Published 22 May 2024 in cs.LG

Abstract: To assist IT service developers and operators in managing their increasingly complex service landscapes, there is a growing effort to leverage artificial intelligence in operations. To speed up troubleshooting, log anomaly detection has received much attention in particular, dealing with the identification of log events that indicate the reasons for a system failure. However, faults often propagate extensively within systems, which can result in a large number of anomalies being detected by existing approaches. In this case, it can remain very challenging for users to quickly identify the actual root cause of a failure. We propose LogRCA, a novel method for identifying a minimal set of log lines that together describe a root cause. LogRCA uses a semi-supervised learning approach to deal with rare and unknown errors and is designed to handle noisy data. We evaluated our approach on a large-scale production log data set of 44.3 million log lines, which contains 80 failures, whose root causes were labeled by experts. LogRCA consistently outperforms baselines based on deep learning and statistical analysis in terms of precision and recall to detect candidate root causes. In addition, we investigated the impact of our deployed data balancing approach, demonstrating that it considerably improves performance on rare failures.

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