FULL PRODUCT VERSION :


ADDITIONAL OS VERSION INFORMATION :
really doesn't matter :P

A DESCRIPTION OF THE PROBLEM :
implementation of FutureTask#isDone is as follows :

public boolean isDone() {
        return state != NEW;
}

while it should be as follows :

public boolean isDone(){
         return state != NEW && state != COMPLETING && state != INTERRUPTING;
}

or (less code, but less readable):

public boolean isDone(){
         return state > COMPLETING && state != INTERRUPTING;
}

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
open sources, go to FutureTask#isDone implementation, read javadoc of Future interface, look at them.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
either

public boolean isDone(){
         return state != NEW && state != COMPLETING && state != INTERRUPTING;
}

or:

public boolean isDone(){
         return state > COMPLETING && state != INTERRUPTING;
}
ACTUAL -
public boolean isDone() {
        return state != NEW;
}

REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
Write your own RunnableFuture implementation with long javadoc explaining.