Created by: typhoonzero

Some unit tests like test_listen_and_serv_op.py, run the test with paddlepaddle/paddle:latest-dev docker image, the call os.kill(pid, signal.SIGTERM) have no effect, while run kill pid in the shell can successfully terminate the process. When using manylinux docker images, this issue is gone.

More info: https://github.com/PaddlePaddle/Paddle/pull/11470