I had
[Wd-LrwpAAD0AAJ3OZM0AAABW] 2017-10-12 20:09:15: Критичний виняток типу «Wikimedia\Rdbms\DBQueryTimeoutError»
On https://es.wikipedia.org/w/index.php?limit=50&title=Especial%3AContribuciones&contribs=user&target=B1mbo&namespace=828&tagfilter=&start=&end=
Works ok after reload (though I noticed after some time so not immediate one). Reporting just in case.
Query in question:
```
SELECT rev_id,rev_page,rev_text_id,rev_timestamp,rev_user_text,rev_user,rev_minor_edit,rev_deleted,rev_len,rev_parent_id,rev_sha1,rev_comment AS `rev_comment_text`,NULL AS `rev_comment_data`,NULL AS `rev_comment_cid`,rev_content_format,rev_content_model,user_name,page_namespace,page_title,page_is_new,page_latest,page_is_redirect,page_len,(SELECT GROUP_CONCAT(ct_tag SEPARATOR ',') FROM `change_tag` WHERE ct_rev_id=rev_id ) AS `ts_tags` FROM `revision` FORCE INDEX (user_timestamp) INNER JOIN `page` ON ((page_id = rev_page)) LEFT JOIN `user` ON ((rev_user != 0) AND (user_id = rev_user)) WHERE rev_user = '15707' AND (page_namespace = '828') AND ((rev_deleted & 4) = 0) ORDER BY rev_timestamp DESC LIMIT 51
```