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Hi,

Oh, I noticed myself the bug 
https://bugs.launchpad.net/nova/+bug/1538204 (nova failed to stop) on 
Grenade tests of one of my Cinder changes. Grenade started on Liberty 
with oslo.service 1.1.0, a version which didn't have my fixes for signal 
handling.

Good news: since upper-constraints.txt of Liberty was updated to use 
oslo.service 0.9.1, the random bug should now be gone (with my fixes for 
signal handling).

I hope that it will help to make Grenade tests more reliable!

Please keep me in touch if you still see the failure, especially this 
message in logs:
""AssertionError: Cannot switch to MAINLOOP from MAINLOOP" error"

Victor

Le 18/02/2016 11:05, Victor Stinner a écrit :
> Hi,
>
>
> Le 17/02/2016 19:29, no-reply at openstack.org a écrit :
>  > We are chuffed to announce the release of:
>  >
>  > oslo.service 0.9.1: oslo.service library
>  > (...)
>  >
>  > Changes in oslo.service 0.9.0..0.9.1
>  > ------------------------------------
>  >
>  > 8b6e2f6 Fix race condition on handling signals
>  > eb1a4aa Fix a race condition in signal handlers
>
> This release contains two major changes to fix race conditions in signal
> handling. Related bugs:
>
> "Race condition in SIGTERM signal handler"
> https://bugs.launchpad.net/oslo.service/+bug/1524907
> => "AssertionError: Cannot switch to MAINLOOP from MAINLOOP" error
>
> "Failed to stop nova-api in grenade tests"
> https://bugs.launchpad.net/nova/+bug/1538204
> => "oslo_service.threadgroup RuntimeError: dictionary changed size
> during iteration"
>
> oslo.service 0.9.1 is now in upper-contraints.txt and so will be
> deployed on Liberty CIs:
> https://review.openstack.org/#/c/280934/
>
> Victor
>
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