'wait()' not called in loop

Reports calls to wait() that are not made inside a loop.

wait() is normally used to suspend a thread until some condition becomes true. As the thread could have been waken up for a different reason, the condition should be checked after the wait() call returns. A loop is a simple way to achieve this.

Example:

  class BoundedCounter {
    private int count;
    synchronized void inc() throws InterruptedException {
      if (count >= 10) wait();
      ++count;
    }
  }

Good code should look like this:

  class BoundedCounter {
    private int count;
    synchronized void inc() throws InterruptedException {
      while (count >= 10) wait();
      ++count;
    }
  }

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.

WaitNotInLoop

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

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,
Can be installed with plugin:	Java, 243.23126

Last modified: 03 December 2024