The following test timed out in the JDK21 CI:

java/util/concurrent/ThreadPerTaskExecutor/ThreadPerTaskExecutorTest.java#platform

Here's a snippet from the log file:

#section:junit
----------messages:(8/369)----------
command: junit -DthreadFactory=platform ThreadPerTaskExecutorTest
reason: User specified action: run junit/othervm -DthreadFactory=platform ThreadPerTaskExecutorTest
started: Sat May 13 13:38:47 UTC 2023
Mode: othervm [/othervm specified]
Timeout information:
--- Timeout information end.
finished: Sat May 13 13:50:02 UTC 2023
elapsed time (seconds): 674.825
----------configuration:(0/0)----------
----------System.out:(1/27)----------
Timeout refired 480 times
----------System.err:(21/2413)----------
STARTED ThreadPerTaskExecutorTest::testSubmitNulls1 '[1] java.lang.ThreadBuilders$PlatformThreadFactory@5fe04fcb'
SUCCESSFUL ThreadPerTaskExecutorTest::testSubmitNulls1 '[1] java.lang.ThreadBuilders$PlatformThreadFactory@5fe04fcb'
STARTED ThreadPerTaskExecutorTest::testSubmitNulls2 '[1] java.lang.ThreadBuilders$PlatformThreadFactory@5fe04fcb'
SUCCESSFUL ThreadPerTaskExecutorTest::testSubmitNulls2 '[1] java.lang.ThreadBuilders$PlatformThreadFactory@5fe04fcb'
STARTED ThreadPerTaskExecutorTest::testInvokeAnyEmpty1 '[1] java.lang.ThreadBuilders$PlatformThreadFactory@5fe04fcb'
SUCCESSFUL ThreadPerTaskExecutorTest::testInvokeAnyEmpty1 '[1] java.lang.ThreadBuilders$PlatformThreadFactory@5fe04fcb'
STARTED ThreadPerTaskExecutorTest::testInvokeAnyEmpty2 '[1] java.lang.ThreadBuilders$PlatformThreadFactory@5fe04fcb'
SUCCESSFUL ThreadPerTaskExecutorTest::testInvokeAnyEmpty2 '[1] java.lang.ThreadBuilders$PlatformThreadFactory@5fe04fcb'
STARTED ThreadPerTaskExecutorTest::testInvokeAnyAfterShutdown '[1] java.util.concurrent.ThreadPerTaskExecutor@737e7993'
SUCCESSFUL ThreadPerTaskExecutorTest::testInvokeAnyAfterShutdown '[1] java.util.concurrent.ThreadPerTaskExecutor@737e7993'
STARTED ThreadPerTaskExecutorTest::testNull 'testNull()'
SUCCESSFUL ThreadPerTaskExecutorTest::testNull 'testNull()'
STARTED ThreadPerTaskExecutorTest::testInterruptInvokeAny '[1] java.util.concurrent.ThreadPerTaskExecutor@183f8340'
SUCCESSFUL ThreadPerTaskExecutorTest::testInterruptInvokeAny '[1] java.util.concurrent.ThreadPerTaskExecutor@183f8340'
STARTED ThreadPerTaskExecutorTest::testInvokeAllInterrupt1 '[1] java.util.concurrent.ThreadPerTaskExecutor@7340aa2e'
SUCCESSFUL ThreadPerTaskExecutorTest::testInvokeAllInterrupt1 '[1] java.util.concurrent.ThreadPerTaskExecutor@7340aa2e'
STARTED ThreadPerTaskExecutorTest::testInvokeAllInterrupt3 '[1] java.util.concurrent.ThreadPerTaskExecutor@1c44ccff'
SUCCESSFUL ThreadPerTaskExecutorTest::testInvokeAllInterrupt3 '[1] java.util.concurrent.ThreadPerTaskExecutor@1c44ccff'
STARTED ThreadPerTaskExecutorTest::testInvokeAllInterrupt4 '[1] java.util.concurrent.ThreadPerTaskExecutor@324e4a07'
SUCCESSFUL ThreadPerTaskExecutorTest::testInvokeAllInterrupt4 '[1] java.util.concurrent.ThreadPerTaskExecutor@324e4a07'
STARTED ThreadPerTaskExecutorTest::testInvokeAllInterrupt6 '[1] java.util.concurrent.ThreadPerTaskExecutor@66865fe4'
----------rerun:(44/6131)*----------

<snip>

result: Error. Program `c:\ade\mesos\work_dir\jib-master\install\jdk-21+23-1937\windows-x64-debug.jdk\jdk-21\fastdebug\bin\java' timed out (timeout set to 480000ms, elapsed time including timeout handling was 674809ms).