#fixed code
                                public BlockInfo request(long height, List<String> sendList) {
        return this.request(height, height, 1, sendList);
    }
#vulnerable code 
                                public BlockInfo request(long height, List<String> sendList) {
        return this.request(height, height, 1,nodeIdList);
    } 
                            #location 2 
                            #vulnerability type THREAD_SAFETY_VIOLATION