#vulnerable code 
                                @Override
    public void setAttribute(String name, Object value) {
        Jboot.getJbootCache().put(SESSION_CACHE_NAME, buildKey(name), value);
    } 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Override
    public void setAttribute(String name, Object value) {
        Jboot.getCache().put(SESSION_CACHE_NAME, buildKey(name), value);
    }