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2024.3

'ThreadLocalRandom' instance might be shared

Warning
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Last modified: 03 December 2024

Reports java.util.concurrent.ThreadLocalRandom instances which might be shared between threads.

A ThreadLocalRandom should not be shared between threads because that is not thread-safe. The inspection reports instances that are assigned to a field used as a method argument, or assigned to a local variable and used in anonymous or nested classes as they might get shared between threads.

Usages of ThreadLocalRandom should typically look like ThreadLocalRandom.current().nextInt(...) (or nextDouble(...) etc.). When all usages are in this form, ThreadLocalRandom instances cannot be used accidentally by multiple threads.

Example:

Use the options to list methods that are safe to be passed to ThreadLocalRandom instances as an argument. It's possible to use regular expressions for method names.