The following test failed in the JDK15 CI due to a timeout:

tools/jpackage/share/jdk/jpackage/tests/MainClassTest.java

Here's a snippet from the log file:

elapsed=1496332 0\:24\:56.332
end=Mon Feb 24 14\:09\:32 GMT 2020
start=Mon Feb 24 13\:44\:36 GMT 2020

I don't see anything suspicious in the log file, but the test
issues a lot of messages so something could be buried
in there.

Starting this bug as a P3 since this is a Tier2 test failure.