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Suppose our code has 2 threads (A and B) have a reference to the same instance of this class somewhere:
public class MyValueHolder {
private int value = 1;
// ... getter and setter
}
When Thread A does myValueHolder.setValue(7), there is no guarantee that Thread B will ever read that value: myValueHolder.getValue() could - in theory - keep returning 1 forever.
In practice however, the hardware will clear the second level cache sooner or later, so Thread B will read 7 sooner or later (usually sooner).
Is there any way to make the JVM emulate that worst case scenario for which it keeps returning 1 forever for Thread B? That would be very useful to test our multi-threaded code with our existing tests under those circumstances.