The following test failed on Linux-X64 in release configs using
jdk-13+9 bits:

jdk/jfr/event/runtime/TestShutdownEvent.java

The test failed in 3 of 3 'release' bits runs. It did not fail at all in the
'fastdebug' or 'slowdebug' bits runs.

This failure mode is not the same as JDK-8219082.

Here's a snippet from one of the failing log files:

----------System.err:(18/1342)----------
java.io.IOException: Not a valid Flight Recorder file. File length is only 0 bytes.
        at jdk.jfr/jdk.jfr.internal.consumer.RecordingInput.<init>(RecordingInput.java:82)
        at jdk.jfr/jdk.jfr.internal.consumer.RecordingInput.<init>(RecordingInput.java:87)
        at jdk.jfr/jdk.jfr.consumer.RecordingFile.<init>(RecordingFile.java:107)
        at jdk.jfr/jdk.jfr.consumer.RecordingFile.readAllEvents(RecordingFile.java:240)
        at jdk.jfr.event.runtime.TestShutdownEvent.runSubtest(TestShutdownEvent.java:97)
        at jdk.jfr.event.runtime.TestShutdownEvent.main(TestShutdownEvent.java:72)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
        at java.base/java.lang.Thread.run(Thread.java:835)

JavaTest Message: Test threw exception: java.io.IOException: Not a valid Flight Recorder file. File length is only 0 bytes.
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.io.IOException: Not a valid Flight Recorder file. File length is only 0 bytes.
----------rerun:(35/3841)*----------