Wikimedia wikis hosted on the "s3" cluster (pretty much all but the
very large wikis, click on the "s3" box in
https://noc.wikimedia.org/dbtree/ to get a full list) are currently in
read-only mode due to severe replication lag. This problem was
apparently caused by a logic issue in the job queue, which should now
be fixed, but it will still take at least 2-3 hours for replication to
catch up. We apologize for the inconvenience, and are continuing to
monitor the situation.
Erik
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Erik Möller
VP of Engineering and Product Development, Wikimedia Foundation
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