'wait()' while holding two locks

Reports calls to wait() methods that may occur while the current thread is holding two locks.

Since calling wait() only releases one lock on its target, waiting with two locks held can easily lead to a deadlock.

Example:

synchronized (lockA) {
  synchronized (lockB) {
    lockB.wait(); //warning
    //thread A is stuck here holding lockA
  }
}

synchronized (lockA) { //thread B can't enter the block and release thread A
  lockB.notify();
}

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Java, 233.SNAPSHOT

Last modified: 13 July 2023