devstack leaves stale .pyc files around

[Steve Loranz]

nova was recently ported to oslo.incubator. This results in devstack raising an exception about duplicate rpc_backend options being registered. The problem is that openstack/common/service.py was not updated as part of that work.

[Christian Martinez (christian-martinez)]

Hi,

Do you know of any workarounds on this (at least until the patch is released)?

Thanks,
Christian

[Mark McLoughlin (markmc)]

AFAICT the real issue here is that devstack doesn't clean up stale .pyc files

[Liusheng (liusheng)]

Mark McLoughlin (markmc) is right.
Even though I haven't find the stale .pyc files should be remove, I used the following command in /opt/stack/nova/ removing all the .pyc files.
find . -name *.pyc -exec rm {} \;
Then, I run:
./unstack.sh
./stack.sh

This problem is solved.

[Khanh-Toan TRAN (toan-tran)]

Thanks Liusheng. That works!

Actually we don't need unstack, just restart the nova deamons is enough. I still do not know which pyc cause this problem.

[Vui Lam (vui)]

+1 on the .pyc removal. For the OP's problem, the culprit was nova/openstack/common/rpc/__init__.pyc.

[Sean Dague (sdague)]

This devstack bug was last updated over 180 days ago, as devstack
is a fast moving project and we'd like to get the tracker down to
currently actionable bugs, this is getting marked as Invalid. If the
issue still exists, please feel free to reopen it.