The following test failed in the JDK21 CI:

java/util/concurrent/ScheduledThreadPoolExecutor/BasicCancelTest.java

Here's a snippet from the log file:

#section:main
----------messages:(8/310)----------
command: main -Xmx8m BasicCancelTest
reason: User specified action: run main/othervm -Xmx8m BasicCancelTest
started: Sun May 14 07:51:07 UTC 2023
Mode: othervm [/othervm specified]
Timeout information:
--- Timeout information end.
finished: Sun May 14 08:05:56 UTC 2023
elapsed time (seconds): 888.77
----------configuration:(0/0)----------
----------System.out:(9/879)*----------
moreThanYouCanChew=1048576
Timeout refired 480 times
[581.073s][error][attach] could not open (2) pipe \\\\.\\pipe\\javatool-647696899 to send result of operation jcmd
[581.073s][error][attach] could not open (2) pipe \\\\.\\pipe\\javatool-1485708053 to send result of operation jcmd
[581.076s][error][attach] could not open (2) pipe \\\\.\\pipe\\javatool-979425775 to send result of operation jcmd
[634.889s][error][attach] could not open (2) pipe \\\\.\\pipe\\javatool-114685658 to send result of operation jcmd
[690.475s][error][attach] could not open (2) pipe \\\\.\\pipe\\javatool-1401145331 to send result of operation jcmd
[690.512s][error][attach] could not open (2) pipe \\\\.\\pipe\\javatool668766197 to send result of operation threaddump
[690.542s][error][attach] could not open (2) pipe \\\\.\\pipe\\javatool263089859 to send result of operation threaddump
----------System.err:(0/0)----------
----------rerun:(45/5827)*----------

<snip>

result: Error. Program `c:\ade\mesos\work_dir\jib-master\install\jdk-21+23-1940\windows-x64-debug.jdk\jdk-21\fastdebug\bin\java' timed out (timeout set to 480000ms, elapsed time including timeout handling was 888747ms).