FULL PRODUCT VERSION :
java version " 1.7.0_07 "
Java(TM) SE Runtime Environment (build 1.7.0_07-b10)
Java HotSpot(TM) 64-Bit Server VM (build 23.3-b01, mixed mode)

A DESCRIPTION OF THE PROBLEM :
Class#getFields() erratically reports fields of the same class mutiple times or leaves existing fields out. If -Dsun.reflect.noCaches=true is set the error vanishes.

One example for this behaviour involved a class concrete class with a hierachy analog to

public interface IBase

public interface IDerived extends IBase

public abstract class AbstractBase implements IBase

public abstract class AbstractDerived extends AbstractBase
  implements IDerived

public abstract class AbstractOther extends AbstractDerived
  implements IOther

public class Concrete extends AbstractOther


(Static) fields from IBase were sometimes reported twice; fields from Concrete were ignored.


REPRODUCIBILITY :
This bug can be reproduced always.