'ThreadLocal' field not declared 'static final'

Reports fields of type java.lang.ThreadLocal that are not declared static final.

In the most common case, a java.lang.ThreadLocal instance associates state with a thread. A non-static non-final java.lang.ThreadLocal field associates state with an instance-thread combination. This is usually unnecessary and quite often is a bug that can cause memory leaks and incorrect behavior.

A quick-fix is suggested to make the field static final.

Example:

private ThreadLocal tl = ThreadLocal.withInitial(() -> Boolean.TRUE);

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.

ThreadLocalNotStaticFinal

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 2024.2, Qodana for JVM 2024.2,
Can be installed with plugin:	Java, 242.22892

Last modified: 11 September 2024