java客户端收到未声明的检查异常，但异常被声明为已捕获

Question

我的RMI服务器接口声明了一个方法foo（），该方法被声明为引发RemoteException和Exception，如下所示：

public interface Node extends RemoteService {

   public void foo() throws RemoteException, Exception;
}

服务器实现是：

public class NodeImpl extends UnicastRemoteObject implements Node {

    public void foo() throws RemoteException, Exception {
      // Implementation - calls other stuff...
    }
}

我的客户端在服务器上调用foo：

try {
  node.foo();
}
catch (Exception e) {
   System.err.print("Got exception from foo() of type " + e.getClass().getName());
   System.err.println("Exception: " + e.getMessage());
}

现在，当我运行客户端时，我得到：

Got exception from foo() of type java.rmi.UnexpectedException Exception: undeclared checked exception; nested exception is: java.io.InterruptedIOException: The operation timed out

Java文档是这样说的。rmi。意外情况：

An UnexpectedException is thrown if the client of a remote method call receives, as a result of the call, a checked exception that is not among the checked exception types declared in the throws clause of the method in the remote interface.

但我的远程接口指定foo（）抛出异常，而java。伊奥。InterruptedIOException是一种异常。那么为什么我的客户会得到意想不到的例外呢

谢谢， 汤姆