java/lang/ThreadGroup/Stop.java fails intermittently, even after JDK-8132548
But now looks like not test issue anymore.

----------System.err:(15/874)----------
java.lang.InterruptedException
	at java.lang.Object.wait(java.base@9-ea/Native Method)
	at java.lang.Thread.join(java.base@9-ea/Thread.java:1352)
	at java.lang.Thread.join(java.base@9-ea/Thread.java:1426)
	at Stop.main(Stop.java:65)
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-ea/Native Method)
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(java.base@9-ea/NativeMethodAccessorImpl.java:62)
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-ea/DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(java.base@9-ea/Method.java:535)
	at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:226)
	at java.lang.Thread.run(java.base@9-ea/Thread.java:843)


The exception is from Thread.join(), from line 65:
        // Launch two threads as part of the same thread group
        first.start();
        second.start();

        // Check that the second thread is terminated when the
        // first thread terminates the thread group.
65:   second.join();
        // Test passed - if never get here the test times out and fails.


Also note that .jtr log shows the "main" elapsed 120 seconds:

...
#section:main
----------messages:(4/123)----------
command: main Stop
reason: Assumed action based on file name: run main Stop 
Mode: agentvm
elapsed time (seconds): 120.005

...

Is the "main" (and all) thread be Interrupted by jtreg? (120 seconds is the jtreg "default timeout" )