Oslo.cache version 2.1.0 is now blacklisted [1] to avoid similar issues for now. A new `memcache_pool` backend job have been introduced (not yet merged) through a patch [2] to oslo.cache to help us to catch similar errors during CI. Now we have 2 ways to definitely fix the situation on oslo.cache: - fix the broken code [3] and release a new patched version (2.1.1), still WIP; - revert the initial changes [4] and release a new version free from this bug (2.2.0). After some discussions with other oslo cores we want to give priority to the fix [3] first. Do not hesitate to correct me if something is wrong here. Cheers, PS: improvements and fix described in my previous email have been merged together [3]. [1] https://review.opendev.org/#/c/711427/ [2] https://review.opendev.org/#/c/711422/ [3] https://review.opendev.org/#/c/711220/ [4] https://review.opendev.org/#/c/711439/ Le mer. 4 mars 2020 à 19:23, Herve Beraud <hberaud@redhat.com> a écrit :
I proposed the following two patches to address the issue and improve this module beyond the current issue: - https://review.opendev.org/711220 (the fix) - https://review.opendev.org/711247 (the improvements)
After these patches will be merged and the issue fixed we will blacklist the version 2.1.0 of oslo.cache and propose a new release with the previous fixes embedded.
Do not hesitate to review them and leave comments.
Thanks for your reading.
Le mer. 4 mars 2020 à 14:16, Herve Beraud <hberaud@redhat.com> a écrit :
Fix proposed https://review.opendev.org/#/c/711220/
Le mer. 4 mars 2020 à 13:42, Moises Guimaraes de Medeiros < moguimar@redhat.com> a écrit :
`dead_timeout`++
On Wed, Mar 4, 2020 at 1:36 PM Herve Beraud <hberaud@redhat.com> wrote:
`dead_timeout` [1] looks more appropriate in this case.
[1] https://github.com/pinterest/pymemcache/blob/master/pymemcache/client/hash.p...
Le mer. 4 mars 2020 à 13:28, Herve Beraud <hberaud@redhat.com> a écrit :
What do you think about adding a mapping between `retry_timeout` [1] and `dead_retry` [2]?
[1] https://github.com/pinterest/pymemcache/blob/master/pymemcache/client/hash.p... [2] https://github.com/linsomniac/python-memcached/blob/bad41222379102e3f18f6f2f...
Le mer. 4 mars 2020 à 13:20, Herve Beraud <hberaud@redhat.com> a écrit :
I think our issue is due to the fact that python-memcached accept a param named `dead_retry` [1] which is not defined in pymemcache.
We just need to define it in our oslo.cache mapping. During testing we faced the same kind of issue with connection timeout.
[1] https://github.com/linsomniac/python-memcached/blob/bad41222379102e3f18f6f2f... [2] https://github.com/openstack/oslo.cache/blob/8a8248d764bbb1db6c0089a58745803...
Le mer. 4 mars 2020 à 12:21, Radosław Piliszek < radoslaw.piliszek@gmail.com> a écrit :
> Please be informed that oslo.cache 2.1.0 breaks > oslo_cache.memcache_pool > > Kolla-Ansible gate is already RED and a quick codesearch revealed > other deployment methods might be in trouble soon as well. > > This does not affect devstack/tempest as they use > dogpile.cache.memcached instead. > > The error is TypeError: __init__() got an unexpected keyword argument > 'dead_retry' > > For details see: https://bugs.launchpad.net/oslo.cache/+bug/1866008 > > -yoctozepto > >
-- Hervé Beraud Senior Software Engineer Red Hat - Openstack Oslo irc: hberaud -----BEGIN PGP SIGNATURE-----
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--
Moisés Guimarães
Software Engineer
Red Hat <https://www.redhat.com>
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