In a multithreaded application, the moment two threads read and write the same variable without synchronization, you have a race condition. The classic fixes — synchronized, volatile, Lock — add ...

ThreadLocal provides a mechanism to store and retrieve data that is scoped to the current thread, ensuring that each thread has its own isolated copy. get() : Retrieves the value associated with the ...

In my previous article “Double-Checked Locking: Clever, but Broken,” I looked at some of the problems with double-checked locking (DCL), an idiom recommended by a number of Java books and articles as ...

This month’s Java 101 concludes the thread series by focusing on thread groups, volatility, thread-local variables, timers, and the ThreadDeath class. Java requires every thread and every thread group ...

Let me start with a confession: I used to trust ThreadLocal. It seemed harmless. You put some context in, grab it later on in the same thread, and life is good. Logging frameworks use it. Security ...