'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
  }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

NakedNotify

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Threading issues

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Java, 241.18072

Last modified: 18 June 2024