Concurrency TCK is getting signature test failures on Java 21. See https://github.com/jakartaee/concurrency/issues/392 TCK challenge + https://github.com/jakartaee/concurrency/pull/393.

Failures are:

2023-12-05 12:37:56,913 INFO [stdout] (default task-1) Added Superclasses or Superinterfaces
2023-12-05 12:37:56,913 INFO [stdout] (default task-1) -------------------------------------
2023-12-05 12:37:56,913 INFO [stdout] (default task-1)
2023-12-05 12:37:56,914 INFO [stdout] (default task-1) jakarta.enterprise.concurrent.ManagedExecutorService: interface java.lang.AutoCloseable
2023-12-05 12:37:56,914 INFO [stdout] (default task-1) jakarta.enterprise.concurrent.ManagedScheduledExecutorService: interface java.lang.AutoCloseable
2023-12-05 12:37:56,914 INFO [stdout] (default task-1)
2023-12-05 12:37:56,914 INFO [stdout] (default task-1) Added Methods
2023-12-05 12:37:56,914 INFO [stdout] (default task-1) -------------
2023-12-05 12:37:56,914 INFO [stdout] (default task-1)
2023-12-05 12:37:56,914 INFO [stdout] (default task-1) jakarta.enterprise.concurrent.ManagedExecutorService: method public void java.util.concurrent.ExecutorService.close()
2023-12-05 12:37:56,914 INFO [stdout] (default task-1) jakarta.enterprise.concurrent.ManagedScheduledExecutorService: method public void java.util.concurrent.ExecutorService.close()
2023-12-05 12:37:56,914 INFO [stdout] (default task-1)
2023-12-05 12:37:56,914 INFO [stdout] (default task-1) ********** Package 'jakarta.enterprise.concurrent' - FAILED (STATIC MODE) **********
2023-12-05 12:37:56,914 INFO [stdout] (default task-1)
2023
.
.
.
2023-12-05 12:37:57,153 INFO [stdout] (default task-1) Added Superclasses or Superinterfaces
2023-12-05 12:37:57,153 INFO [stdout] (default task-1) -------------------------------------
2023-12-05 12:37:57,153 INFO [stdout] (default task-1)
2023-12-05 12:37:57,153 INFO [stdout] (default task-1) jakarta.enterprise.concurrent.ManagedExecutorService: interface java.lang.AutoCloseable
2023-12-05 12:37:57,153 INFO [stdout] (default task-1) jakarta.enterprise.concurrent.ManagedScheduledExecutorService: interface java.lang.AutoCloseable
2023-12-05 12:37:57,153 INFO [stdout] (default task-1)
2023-12-05 12:37:57,153 INFO [stdout] (default task-1) Added Methods
2023-12-05 12:37:57,153 INFO [stdout] (default task-1) -------------
2023-12-05 12:37:57,156 INFO [stdout] (default task-1)
2023-12-05 12:37:57,156 INFO [stdout] (default task-1) jakarta.enterprise.concurrent.ManagedExecutorService: method public void java.util.concurrent.ExecutorService.close()
2023-12-05 12:37:57,156 INFO [stdout] (default task-1) jakarta.enterprise.concurrent.ManagedScheduledExecutorService: method public void java.util.concurrent.ExecutorService.close()
2023-12-05 12:37:57,156 INFO [stdout] (default task-1)
2023-12-05 12:37:57,156 INFO [stdout] (default task-1)
2023-12-05 12:37:57,156 INFO [stdout] (default task-1)
2023-12-05 12:37:57,156 INFO [stdout] (default task-1) ********** Package 'jakarta.enterprise.concurrent' - FAILED (REFLECTION MODE) **********