BewareMyPower commented on issue #9906:
URL: https://github.com/apache/pulsar/issues/9906#issuecomment-799049682
I tried with OpenCV 4.5 that is installed by `pip3 install opencv-python`
and Pulsar client that is built with latest master in MacOS Big Sur 11.2.
Then tried the command line with a Pulsar standalone, there's no error.
```
>>> import cv2
>>> import pulsar
>>> client = pulsar.Client(service_url='pulsar://localhost:6650')
>>> producer = client.create_producer(topic='my-topic')
2021-03-15 10:27:41.285 INFO [0x117ca8e00] ConnectionPool:85 | Created
connection for pulsar://localhost:6650
2021-03-15 10:27:41.295 INFO [0x7000043a9000] ClientConnection:372 |
[127.0.0.1:50925 -> 127.0.0.1:6650] Connected to broker
2021-03-15 10:27:41.301 INFO [0x7000043a9000] HandlerBase:54 |
[persistent://public/default/my-topic, ] Getting connection from pool
2021-03-15 10:27:41.310 INFO [0x7000043a9000] ProducerImpl:176 |
[persistent://public/default/my-topic, ] Created producer on broker
[127.0.0.1:50925 -> 127.0.0.1:6650]
>>> producer.send('hello'.encode())
<_pulsar.MessageId object at 0x117b28190>
>>> img = cv2.imread('./images/lena.png')
>>> _, image_np_array = cv2.imencode('.jpg', img)
>>> print(image_np_array)
[[255]
[216]
[255]
...
[207]
[255]
[217]]
```
The segmentation fault might be something with the dependencies conflicts
with Pulsar and OpenCV. But it's hard to debug. I suggest that you can simplify
your code and watch the result again. BTW, you can also try to print the
backtrace, see
https://stackoverflow.com/questions/16731115/how-to-debug-a-python-segmentation-fault
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