安装paddlepaddle 2.0.0rc0；Python 3.6.8；操作系统Centos7.9

执行：

[root@localhost /]# hub serving start -m chinese_ocr_db_crnn_server
W1201 14:42:49.340327 47935 analysis_predictor.cc:1042] Deprecated. Please use CreatePredictor instead.
chinese_ocr_db_crnn_server == 1.1.0
* Serving Flask app "paddlehub.serving.app_single" (lazy loading)
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
INFO:werkzeug: * Running on http://0.0.0.0:8866/ (Press CTRL+C to quit)

启动PaddleHub Serving成功，然后按文档写了一个测试：

import requests
import json
import cv2
import base64

def cv2_to_base64(image):
data = cv2.imencode('.jpg', image)[1]
return base64.b64encode(data.tostring()).decode('utf8')

# 发送HTTP请求
data = {'images':[cv2_to_base64(cv2.imread("/Images/Image2.jpg"))]}
headers = {"Content-type": "application/json"}
url = "http://127.0.0.1:8866/predict/chinese_ocr_db_crnn_server"
r = requests.post(url=url, headers=headers, data=json.dumps(data))

# 打印预测结果
print(r.json()["results"])

执行：

#python3 test1.py

PaddleHub Serving报错然后退出

/root/.paddlehub/modules/chinese_ocr_db_crnn_server/utils.py:188: DeprecationWarning: The binary mode of fromstring is deprecated, as it behaves surprisingly on unicode inputs. Use frombuffer instead
data = np.fromstring(data, np.uint8)
已杀死

这是什么问题啊？