On 17/03/2020 20:14, Brennen Bearnes wrote:
> The 1.35.0-wmf.23 version of MediaWiki is still blocked[0].
> 
> Neither this version nor the subsequent 1.35.0-wmf.24 can proceed until
> this issue is resolved:
> 
> * T247562: Warning: Memcached::setMulti(): failed to set key
> global:segment:...
> - https://phabricator.wikimedia.org/T247562
> 
> Thanks to the many folks who have contributed debugging on T247562 so
> far.  If anyone else has any insight, further input would be certainly
> be appreciated.
> 
> -- Your erratic train enabler
> 
> [0]. <https://phabricator.wikimedia.org/T233871>

Hello,

Eventually we have found the root cause of the issue. The local cache
was being invalidated when different wikis tried to use it which caused
MediaWiki processes to fetch a large key from the same memcached server
and overloading it.

The hotfix is deployed. I will push 1.35.0-wmf.23 to all wikis this
afternoon at or slightly after 13:00 UTC.


-- 
Antoine "hashar" Musso

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