Apr 16 · 10 min read · Source: Reasons Thread Pool Misconfiguration Creates Fake Throughput in Java Backends 1. A quiet alarm: why you shouldn't trust requests/sec alone In a production incident I investigated, dashboards showed impressive requests/sec during a sudd...
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Apr 8 · 11 min read · Source: Reasons Circuit Breakers Fail in Real Systems When Timeouts, Retries, and Bulkheads Fight Each Other 1. Why your "smart" circuit breaker still blows up your system Production systems rarely fail in isolation. Instead they fail as emerg...
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Mar 22 · 23 min read · Source: Techniques for Writing Thread-Safe Code Without Using Synchronized Locks 1. What thread-safe code really means without locks Thread safety is often misunderstood as merely “preventing crashes when multiple threads run.” That definition...
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Feb 4 · 6 min read · Source: Series of Questions in Backend Developer Interviews Part 3 1. Deep Copy vs Shallow Copy – What Really Happens? Developers often say “shallow copy copies reference, deep copy copies data,” but this shortcut hides the subtlety that expla...
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Feb 3 · 6 min read · Source: Series of Backend Interview Questions for Java Developers Part 2 1. What does a thread dump contain, and how do you detect deadlocks from a stack trace? A thread dump is essentially an MRI scan of the JVM’s brain taken at a specific mo...
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Dec 12, 2025 · 5 min read · Source: Techniques to Manage Global Variables in Spring Boot Without Breaking Thread-Safety 1. Introduction: Why “Global Variables” Are a Hidden Danger in Spring Boot 1.1 The Naive Way — And Why It Fails Consider this simple (but dangerou...
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Sep 5, 2025 · 4 min read · Source: Add UUIDs to Logs in Spring Boot for Better Traceability 1. Why Add UUIDs to Logs? Improved Traceability Across Systems In microservices architecture, a single user request can span multiple services. By associating a unique UUID w...
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Jul 30, 2025 · 4 min read · Source: Techniques for Configuring Executors and Guava RateLimiter for Effective Multithreaded Processing 1. Understanding Executors and Their Role in Multithreading 1.1 What is an Executor? In Java, the Executor framework provides a high...
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Jul 12, 2025 · 5 min read · Source: Reasons Why Pre-Increment and Post-Increment Operators in Java Can Make or Break Your Code 1. Understanding Increment Operators in Java 1.1 What Are Pre-Increment and Post-Increment? Increment operators in Java are shortcuts to in...
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Jul 4, 2025 · 4 min read · Source: Why the yield() Function in Java Does Not Work and How to Address It 1. What Is the yield() Function in Java? The yield() function is a static method of the Thread class. Its intended purpose is to pause the current thread, allowing ot...
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