Hi!
We are having some issues with 2 of the Wikidata Query
Service
servers. So far, the issue looks like data corruption, probably
related to an issue in Blazegraph itself (the database engine behind
Wikidata Query Service). The issue prevents updates to the data, but
reads are unaffected as far as we can tell.
The incident report for this issue is here:
https://wikitech.wikimedia.org/wiki/Incident_documentation/20190110-WDQS
It will be updated if we have any new developments or new information.
As of now, all servers are working normally.
--
Stas Malyshev
smalyshev(a)wikimedia.org