* Symptom
```
STDERR:
java.lang.IllegalStateException: Values mismatch after swaps
        at TestUnsafeOffheapSwap.test(TestUnsafeOffheapSwap.java:83)
        at TestUnsafeOffheapSwap.main(TestUnsafeOffheapSwap.java:56)
        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.MainWrapper$MainThread.run(MainWrapper.java:127)
        at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.IllegalStateException: Values mismatch after swaps
JavaTest Message: shutting down test
```