celery问题记录

1. 问题：WARNING/MainProcess] /home/jihonghe/.virtualenvs/py3_dj217_env/lib/python3.6/site-packages/billiard/__init__.py:321: RuntimeWarning: force_execv is not supported as the billiard C extension is not installed

解决方案：github-celery-issue

其中，关于billiard的版本问题需要说明一下：在uninstall billiard后重新install billiard时要注意版本兼容问题，如果install的版本不兼容则会出现Error: ERROR: celery 3.1.26.post2 has requirement billiard<3.4,>=3.3.0.23, but you'll have billiard 3.5.0.5 which is incompatible.可以按照提示install billiard版本为3.3.023，即执行 pip3 install billiard==3.3.0.23 。至此，问题解决。