Thread Starvation in Java: Pools, Carriers and Priorities
Thread starvation in Java rarely comes from unfair locks. Pool starvation, head-of-line blocking and CPU-bound virtual threads cause it, and I ran each one.
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6 PostsHow to Use synchronized Blocks and Methods Correctly in Java
Learn how to use Java's synchronized keyword correctly — with real payment and banking examples covering race conditions, synchronized methods, blocks, deadlock-free transfers, double-checked locking, and virtual thread pitfalls. Covers Java 8 through 21
How to Use CompletableFuture for Async Programming in Java
Learn how to use Java's CompletableFuture for async programming — with real payment pipeline examples covering supplyAsync, thenCompose, thenCombine, error handling, and custom thread pools. Covers Java 8, 9, and 21.
How to Use ScheduledExecutorService for Periodic Tasks in Java
Learn how to use Java's ScheduledExecutorService for periodic tasks — with real Kafka and payment pipeline examples covering scheduleAtFixedRate, scheduleWithFixedDelay, exception handling, graceful shutdown, and virtual threads. Covers Java 8 through 21.
ThreadLocal Goes Missing Inside StructuredTaskScope
A ThreadLocal that worked fine in a thread pool returns null the moment a virtual thread forks a subtask. Here's the mechanism, and what actually fixes it.
Virtual Thread Pinning: Why synchronized Froze Your App
Virtual threads pinned by synchronized collapse throughput to your CPU count and can hang outright. Diagnose pinning on JDK 21 and fix it on 24+.