Inspectopedia 2025.2 Help

Call to 'Thread.sleep()' while synchronized

Reports calls to java.lang.Thread.sleep() methods that occur within a synchronized block or method.

sleep() within a synchronized block may result in decreased performance, poor scalability, and possibly even deadlocking. Consider using wait() instead, as it will release the lock held.

Example:

synchronized (lock) { Thread.sleep(100); }

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.

SleepWhileHoldingLock
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

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection SleepWhileHoldingLock

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details

By default bundled with:

IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025