Greenlet runtime error and deployed app in docker keeps booting all the workers

Question

RuntimeWarning: greenlet.greenlet size changed, may indicate binary incompatibility. Expected 144 from C header, got 152 from PyObject

And all the workers are being booted.

2020-09-28T14:09:41.864089908Z [2020-09-28 14:09:41 +0000] [31] [INFO] Booting worker with pid: 31 2020-09-28T14:09:43.933141974Z [2020-09-28 14:09:43 +0000] [32] [INFO] Booting worker with pid: 32 2020-09-28T14:09:44.317436676Z [2020-09-28 14:09:44 +0000] [33] [INFO] Booting worker with pid: 33 2020-09-28T14:09:44.795236476Z [2020-09-28 14:09:44 +0000] [34] [INFO] Booting worker with pid: 34

It was working fine a week back or so and now I'm starting to have the problem.

Answer 1

as https://discuss.redash.io/t/binary-compatibility-issue-with-greenlet/7237 indicates a workaround is greenlet==0.4.16 or upgrade your gevent to 20.9.0

following fix is suggested on the greenlet github page

https://github.com/python-greenlet/greenlet/issues/178#issuecomment-697342964

also see following issues

• https://github.com/python-greenlet/greenlet/issues/180
• https://github.com/python-greenlet/greenlet/issues/182
• https://github.com/python-greenlet/greenlet/issues/178

Answer 2

The issue is resolved with gevent version 22.10.2 with greenlet version 2.0.1

Answer 3

Here's the combination that worked for me, as I was getting this error on Mac OS 13[M1(ARM)], if your env is other than this the latest version of Greenlet will work.

give it a try for Mac (ARM)

gevent==21.8.0
greenlet==1.1.3
gunicorn==20.1.0