懵逼， controller 中两个接口调用 service 同一方法，方法中有递归操作，前端一个页面异步调用这两个接口，后端出现线程问题

cantroller 层 @PostMapping("/traffic/records") public List listTrafficRecord() { List doorRecordInfoVOList = doorApiService.doorRecordList(null); return doorRecordInfoVOList.stream() .limit(3) .collect(Collectors.toList());

}

@GetMapping("/visitor/record") public List listVisitorRecord() { List doorRecordInfoVOList = doorApiService.doorRecordList("4"); return doorRecordInfoVOList.stream() .limit(2) .collect(Collectors.toList()); } service 实现

public List<DoorRecordInfoVO> doorRecordList(String typeFlag) {
    reentrantLock.lock();
    try {
        //首先获取 token
        String token = this.getToken();
        if (StrUtil.isEmpty(token)) {
            return null;
        }
        List<DoorRecordInfoVO> doorRecordInfoVOList = new ArrayList<>();
        LocalDateTime now = LocalDateTime.now();
        LocalDateTime start = now.minusHours(12L);
        return handleList(doorRecordInfoVOList, now, start, token, typeFlag, 0);
    }finally {
        reentrantLock.unlock();
    }
}

private List<DoorRecordInfoVO> handleList(List<DoorRecordInfoVO> doorRecordInfoVOList,
                                          LocalDateTime now,
                                          LocalDateTime start,
                                          String token,
                                          String typeFlag,
                                          int retryCount) {
    //判断两个时间是不是在同一天
    if (now.toLocalDate().equals(start.toLocalDate())) {
        //在同一天组装时间范围
        String date = now.format(DateTimeFormatter.ofPattern("yyyyMMdd"));
        String startTime = start.format(DateTimeFormatter.ofPattern("HHmmss"));
        String endTime = now.format(DateTimeFormatter.ofPattern("HHmmss"));
        JSONArray recordArray = this.apiResult(token, date, startTime, endTime);
        this.addArrayToList(recordArray, doorRecordInfoVOList, typeFlag);
    } else {
        //不在同一天
        String date = now.format(DateTimeFormatter.ofPattern("yyyyMMdd"));
        String endTime = now.format(DateTimeFormatter.ofPattern("HHmmss"));
        JSONArray recordArray1 = this.apiResult(token, date, "000000", endTime);
        this.addArrayToList(recordArray1, doorRecordInfoVOList, typeFlag);
        //加上前一天时间段
        String preDate = start.format(DateTimeFormatter.ofPattern("yyyyMMdd"));
        String startTime = start.format(DateTimeFormatter.ofPattern("HHmmss"));
        JSONArray recordArray2 = this.apiResult(token, preDate, startTime, "235959");
        this.addArrayToList(recordArray2, doorRecordInfoVOList, typeFlag);
    }
    if (doorRecordInfoVOList.size() < 3) {
        now = start;
        start = start.minusHours(1L);
        handleList(doorRecordInfoVOList, now, start, token, typeFlag, retryCount + 1);
    }
    return doorRecordInfoVOList;
}


private void addArrayToList(JSONArray array, List<DoorRecordInfoVO> doorRecordInfoVOList, String typeFlag) {
    if (ObjectUtil.isEmpty(array)) return;
    for (int i = 0; i < array.size(); i++) {
        JSONObject record = array.getJSONObject(i);
        DoorRecordInfoVO doorRecordInfoVO = new DoorRecordInfoVO();
        String type = record.getStr("recogResult");
        doorRecordInfoVO.setUserName(record.getStr("userName"));
        doorRecordInfoVO.setDoorName(record.getStr("doorName"));
        doorRecordInfoVO.setOpenTime(
                HcDateUtil.dateFormat(record.getStr("openTime"), "yyyyMMddHHmmss", "yyyy-MM-dd HH:mm:ss")
        );
        doorRecordInfoVO.setRecordType(type);
        if (StrUtil.isNotEmpty(typeFlag) && typeFlag.equals(type)) {
            doorRecordInfoVOList.add(doorRecordInfoVO);
        } else if (StrUtil.isEmpty(typeFlag)) {
            doorRecordInfoVOList.add(doorRecordInfoVO);
        }
    }
}

private JSONArray apiResult(String token, String date, String startTime, String endTime) {
    JSONArray jsonArray = null;
    //组装请求参数
    Map<String, Object> requestMap = new HashMap<>();
    Map<String, Object> map = new HashMap<>();

    map.put("beginTime", startTime);
    map.put("endTime", endTime);
    map.put("date", date);

    requestMap.put("data", map);
    //调用 api 获取数据
    String body = HttpRequest
            .post(getDoorRecordInfoUrl)
            .header("token", token)
            .header("appId", appId)
            .header("Content-Type", "application/json")
            .body(JSONUtil.toJsonStr(requestMap))
            .execute()
            .body();
    JSONObject resultJson = JSONUtil.parseObj(body);
    Integer code = resultJson.getInt("code");
    if (code == 200) {
        JSONObject data = resultJson.getJSONObject("data");
        jsonArray = data.getJSONArray("data");
    }
    return jsonArray;
}

上述实现如果我不加上 reentrantLock ，doorRecordInfoVOList 线程安全问题，有一个接口直接返回空了，但是直接分开调用，都有返回，请问这个为啥会有线程安全问题，求大佬指教