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'notify()' or 'notifyAll()' without corresponding state change

Reports Object.notify() or Object.notifyAll() being called without any detectable state change occurring.

Normally, Object.notify() and Object.notifyAll() are used to inform other threads that a state change has occurred. That state change should occur in a synchronized context that contains the Object.notify() or Object.notifyAll() call, and prior to the call. While not having such a state change isn't necessarily incorrect, it is certainly worth examining.

Example:

synchronized (this) { notify(); } // no state change synchronized (this) { notify(); // this notify might be redundant }

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024