My colleague Sorin Basca reports:

java.util.prefs.FileSystemPreferences catches and handles an InterruptedException and fails to restore the interrupt status here:

https://github.com/openjdk/jdk/blob/64a79d898637e9255e6c1133dd684e272d84b95c/src/java.prefs/unix/classes/java/util/prefs/FileSystemPreferences.java#L959-L961

It should call `Thread.currentThread().interrupt();` to restore the interrupt status.