The test might fail because an expected collection can't be found. This is likely caused by a loaded system where the concurrent cycle doesn't finish in time to see the expected Mixed gc.

----------System.err:(16/985)----------
java.lang.RuntimeException: Expected GC not found: Pause Mixed: expected true, was false
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertTrue(Asserts.java:486)
at TestVerifyGCType.verifyCollection(TestVerifyGCType.java:176)
at TestVerifyGCType.testFullAndRemark(TestVerifyGCType.java:95)
at TestVerifyGCType.main(TestVerifyGCType.java:53)
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:564)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:230)
at java.base/java.lang.Thread.run(Thread.java:844)