Understanding CAS: Solving the ABA Problem and Other Pitfalls in Java Concurrency

This article explains the classic ABA issue in Java's Compare‑And‑Swap (CAS) operations, outlines why long spin loops and single‑variable limitations can degrade performance, and presents practical solutions such as AtomicStampedReference, LockSupport, ReentrantLock, and optimized data structures to mitigate these challenges.

ABA problemCASJava concurrency

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Understanding CAS: Solving the ABA Problem and Other Pitfalls in Java Concurrency

Wukong Talks Architecture

Aug 25, 2020 · Backend Development

Understanding the ABA Problem in CAS and Solving It with AtomicStampedReference

This article explains the ABA issue that can occur in Java's compare‑and‑swap (CAS) operations, illustrates it with a building‑block analogy and concrete code examples, and shows how versioned atomic references such as AtomicStampedReference can reliably prevent the problem.

ABA problemAtomicReferenceCAS

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Understanding the ABA Problem in CAS and Solving It with AtomicStampedReference

Xiao Lou's Tech Notes

May 13, 2020 · Backend Development

How AtomicStampedReference Solves the ABA Problem in Java Concurrency

This article explains the ABA issue inherent in Java's CAS operations, demonstrates it with AtomicInteger examples, and shows how AtomicStampedReference (and AtomicMarkableReference) use version stamps to prevent erroneous multiple updates in multithreaded environments.

ABA problemCASatomicstampedreference

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How AtomicStampedReference Solves the ABA Problem in Java Concurrency