Java
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How to Read a Flame Graph: A Practical Profiling Guide for JVM Developers
async-profiler demystified — learn to spot the hot frames, understand the stack, and fix what actually matters. Why Flame Graphs…
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Reading JVM Safepoint Logs Without Going Mad: A Practical Stop-the-World Diagnosis Guide
JFR and async-profiler guides are everywhere. Safepoint logs — the raw output that tells you exactly why your JVM froze — are…
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String Deduplication Is On By Default in G1 — And Most Developers Don’t Know What It Does
A granular look at what the JVM is quietly doing with your strings at the native level, when that work…
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The Database Migration Risk That Hibernate Silently Creates
Why hbm2ddl.auto=update is still in production codebases — and what to do about it Somewhere in a production codebase right now, Hibernate…
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Understanding OAuth 2.0 Token Exchange
In modern software architectures, especially microservices-based systems, authentication is no longer a simple “login once, use everywhere” problem. A single…
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A Complete Guide to MFA in Spring Security 7
Multi-Factor Authentication (MFA) is a security mechanism that requires users to verify their identity using multiple authentication methods before gaining…
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Dependency Confusion Attacks in Maven: How They Work and Why Your settings.xml Makes You Vulnerable
In 2021, a security researcher breached Apple, Microsoft, PayPal, and 32 other organisations without writing a single exploit. He just…
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Mutation Testing With PIT in Java: The Coverage Metric You’re Ignoring That Actually Measures Test Quality
Line coverage tells you which code ran. Mutation testing tells you whether your tests would actually catch a bug. Here…
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The Lies Your Microbenchmarks Tell You: A JMH Field Guide for Backend Engineers
JMH is powerful, but deceptively easy to misuse. Here are the five pitfalls that silently corrupt your results — and…
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