The following test timed out in the JDK21 CI:

gc/cslocker/TestCSLocker.java

Here's a snippet from the log file:

#section:main
----------messages:(8/332)----------
command: main -Xmx256m gc.cslocker.TestCSLocker
reason: User specified action: run main/native/othervm -Xmx256m gc.cslocker.TestCSLocker
started: Mon May 22 18:49:49 UTC 2023
Mode: othervm [/othervm specified]
Timeout information:
--- Timeout information end.
finished: Mon May 22 19:02:03 UTC 2023
elapsed time (seconds): 734.202
----------configuration:(0/0)----------
----------System.out:(1/26)----------
Timeout refired 480 times
----------System.err:(0/0)----------
----------rerun:(39/7096)*----------

<snip>

result: Error. Program `/opt/mach5/mesos/work_dir/jib-master/install/jdk-21+24-2057/linux-x64.jdk/jdk-21/bin/java' timed out (timeout set to 480000ms, elapsed time including timeout handling was 734189ms).