이클립스에서 Run하였을때 Obsolete methods on the stack

라는 메시지 박스가 뜨네요;;;

이게 무슨 뜻인가요??

NnfTest at localhost:4487 contains obsolete methods.

Reason:

The virtual machine was unable to remove all stack frames running old code from the call stack. The virtual machine is not supplying the debuffer with valid data for thoes frames. Stepping into these obsolete frames may be hazardous to the target virtual machine.

Run할때마다 계속 뜨는데요
대충 해석해보면 무슨뜻인지는 알겠는데 어떻게 해야할지를 모르겠어여^^;;;

쓸모 없는 메소드가 남아있다??