The following test failed in the JDK21 CI:

javax/sound/sampled/Clip/ClipIsRunningAfterStop.java

Here's a snippet from the log file:

#section:main
----------messages:(7/296)----------
command: main ClipIsRunningAfterStop
reason: Assumed action based on file name: run main ClipIsRunningAfterStop
started: Sat May 06 03:56:40 UTC 2023
Mode: othervm
Additional options from @modules: --add-modules java.desktop
finished: Sat May 06 03:57:00 UTC 2023
elapsed time (seconds): 19.968
----------configuration:(3/40)----------
Boot Layer
  add modules: java.desktop

----------System.out:(0/0)----------
----------System.err:(1/108)----------
java: ../nptl/pthread_mutex_lock.c:81: __pthread_mutex_lock: Assertion `mutex->__data.__owner == 0' failed.
----------rerun:(37/5475)*----------

<snip>

result: Failed. Unexpected exit from test [exit code: 134]