#vulnerable code 
                                protected void deleteNode(Handle handle) throws IOException {
        if (cachesize != 0) {
            Node n = (Node) cache.get(handle);
            if (n != null) {
                cacheScore.deleteScore(handle);
                cache.remove(handle);
            }
        }
        dispose(handle);
    } 
                            #location 9 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                protected void deleteNode(Handle handle) throws IOException {
        if (cachesize != 0) {
            Node n = (Node) cache.get(handle);
            if (n != null) synchronized (cache) {
                cacheScore.deleteScore(handle);
                cache.remove(handle);
            }
        }
        dispose(handle);
    }