Learn how to quickly work out what your Java code is doing so you can understand when and why it misbehaves.
Searching for bugs, detangling messy legacy code, or evaluating your codebase for new features sucks up much of a developer’s time. Effectively reading and understanding existing code is a true superpower! Troubleshooting Java, Second Edition teaches you to efficiently analyze and debug Java applications using time-tested tools and new AI-powered techniques.
In Troubleshooting Java, Second Edition you’ll learn:
• Efficiently use debuggers to quickly understand complex code
• Utilize AI-driven tools to automate log analysis, trace execution, and predict problems
• Correctly implement and interpret application logs
• Identify performance bottlenecks and optimize slow execution paths
• Profile SQL queries to diagnose and optimize database interactions
• Evaluate heap dumps to detect and fix memory leaks
• Analyze thread dumps to resolve deadlocks and concurrency issues
• Navigate the intricacies of service-oriented and microservices systems
In Troubleshooting Java, Second Edition Java veteran Laurentiu Spilca shares techniques for reading, profiling, debugging, and optimizing Java code that he’s honed over years working with high-stakes systems. This fully-revised second edition, updates coverage for new Java tools and adds methods for saving time and effort using AI. You’ll master techniques to identify memory leaks, optimize database queries, and resolve threading issues with ease. The code samples are in Java, but the skills you learn in this guide can be applied to any JVM language.
About the book
Troubleshooting Java, Second Edition introduces code investigation techniques that will help you efficiently understand how Java apps work, how to optimize them, and how to fix the bugs that break them. In it, you’ll learn timesaving practices for discovering hidden dependencies, discovering the root causes of crashes, and interpreting unexpected results. Explore debugging tools like IntelliJ IDEA Debugger, JConsole, and Heap Dump Analyzer; and find new coverage on modern Java, cloud-native Java applications, and microservices. Each technique is explored with a hands-on project, such as debugging a slow REST API, resolving a memory leak in a web app, and tuning for high performance.
About the reader
For intermediate Java developers.
About the author
Laurentiu Spilca is a skilled Java and Spring developer and an experienced technology instructor. He is the author of Spring Start Here and Spring Security in Action.
From the Publisher
“Essential techniques leveraging both classic and AI-driven tools.”
Potito Coluccelli, Econocom
“A masterclass in debugging smarter, not harder.”
Nathan Crocker, Checker Corp
“Everything you need to dig deep into your Java programs, plus some promised help from AI.”
Catalin Tudose, Author of JUnit in Action, Third Edition
why this book?
Troubleshooting Java, Second Edition provides a robust toolkit of techniques to deeply inspect and debug Java applications, from interpreting logs and thread dumps to diagnosing memory leaks, performance bottlenecks, and concurrency issues.
The book blends modern AI-assisted approaches with tried-and-true diagnostics, helping you speed up root cause analysis in complex or legacy systems.
Through real-world scenarios and hands-on examples, you’ll learn not just how to fix problems, but how to understand system behavior, anticipate failure modes, and maintain healthier JVM codebases over time.
about Manning
Manning helps developers and tech professionals stay ahead in a fast-moving industry with expert-led books, videos, and projects. Learning never stops, but it’s hard to keep up, so we focus on content that’s practical, clear, and trusted. As an independent publisher, we adapt quickly, from pioneering early-access books to offering DRM-free eBooks. Our series, like “In Action” and “In a Month of Lunches”, reflect a commitment to making complex topics accessible.
Customer Reviews
4.8 out of 5 stars 9
4.9 out of 5 stars 16
4.5 out of 5 stars 22
4.9 out of 5 stars 26
4.5 out of 5 stars 206
4.5 out of 5 stars 117
User experience level
Intermediate Intermediate Intermediate Intermediate Intermediate Intermediate
About the reader
Experience building RESTful APIs required. For intermediate Java developers. For intermediate Java programmers. For intermediate Java developers. Written for developers familiar with core Java features. You don’t have to be a ninja to read this book—just be willing to become one.
Special features
Includes liveBook with out built-in AI assistant. Includes liveBook with out built-in AI assistant. Includes liveBook with out built-in AI assistant. Includes liveBook with out built-in AI assistant. Includes liveBook with out built-in AI assistant. Includes liveBook with out built-in AI assistant.
Page count
352 328 616 704 592 464
ASIN : B0FSS4JFJZ
Publisher : Manning
Accessibility : Learn more
Publication date : November 18, 2025
Language : English
File size : 25.3 MB
Screen Reader : Supported
Enhanced typesetting : Enabled
X-Ray : Not Enabled
Word Wise : Not Enabled
Print length : 630 pages
ISBN-13 : 978-1638357940
Page Flip : Enabled
Best Sellers Rank: #1,780,642 in Kindle Store (See Top 100 in Kindle Store) #298 in Java Computer Programming #436 in Web Programming #499 in Java Programming