ADDITIONAL SYSTEM INFORMATION :
$ java -version
openjdk version "17" 2021-09-14
OpenJDK Runtime Environment Temurin-17+35 (build 17+35)
OpenJDK 64-Bit Server VM Temurin-17+35 (build 17+35, mixed mode, sharing)

A DESCRIPTION OF THE PROBLEM :
The common pool does not process any submitted tasks if the JVM was started with Runtime.getRuntime().availableProcessors() reporting 1. This can be the case when starting it in a container or by setting the -XX:ActiveProcessorCount=1 flag.

REGRESSION : Last worked in version 16.0.2

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the code given below with `java -XX:ActiveProcessorCount=1 ForkJoinForget`.
"Hello World" won't be printed this way

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Tasks submitted to the common pool get executed.
ACTUAL -
Tasks submitted to the common pool aren't executed.

---------- BEGIN SOURCE ----------
import java.util.concurrent.ForkJoinPool;

public class ForkJoinForget {

        public static void main(String[] args) throws Exception {
                ForkJoinPool.commonPool().submit(() -> System.out.println("Hello World"));
                Thread.sleep(1000);
        }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
One of:
- Not using containers with 1 CPU
- manually set the property `java.util.concurrent.ForkJoinPool.common.parallelism` to 1
- Not using -XX:ActiveProcessorCount=1 as startup flag

FREQUENCY : always