**List of steps to reproduce**
request API URL https://de.wikipedia.org/w/api.php?action=query&list=usercontribs&ucuser=Aka&ucnamespace=0
**What happens?**:
"code": "internal_api_error_DBQueryTimeoutError",
"info": "[d0839847-916f-4867-9d1b-3dabfb305d65] Caught exception of type Wikimedia\\Rdbms\\DBQueryTimeoutError",
"errorclass": "Wikimedia\\Rdbms\\DBQueryTimeoutError"
**What should have happened instead?**:
"query": { "usercontribs": [ { ...
**Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc.**:
This worked before many times. It works for all other users I tried or if I remove the "ucnamespace=0" filter.
---
==== Error ====
* mwversion: `1.39.0-wmf.10`
* reqId: `d0839847-916f-4867-9d1b-3dabfb305d65`
* [[ https://logstash.wikimedia.org/app/dashboards#/view/AXFV7JE83bOlOASGccsT?_g=(time:(from:'2022-05-05T22:08:10.000Z',to:'2022-05-06T20:31:34.325Z'))&_a=(query:(query_string:(query:'reqId:%22d0839847-916f-4867-9d1b-3dabfb305d65%22'))) | Find reqId in Logstash ]]
```name=normalized_message
[{reqId}] {exception_url} Wikimedia\Rdbms\DBQueryTimeoutError: A database query timeout has occurred.
Query: SET STATEMENT max_statement_time=30 FOR SELECT rev_id,rev_page,rev_timestamp,rev_minor_edit,rev_deleted,rev_len,rev_parent_id,rev_sha1,comment
```
```name=exception.trace,lines=10
from /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1739)
#0 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1727): Wikimedia\Rdbms\Database->getQueryException(string, integer, string, string)
#1 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1701): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#2 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1202): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#3 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/database/Database.php(1947): Wikimedia\Rdbms\Database->query(string, string, integer)
#4 /srv/mediawiki/php-1.39.0-wmf.10/includes/libs/rdbms/querybuilder/SelectQueryBuilder.php(641): Wikimedia\Rdbms\Database->select(array, array, array, string, array, array)
#5 /srv/mediawiki/php-1.39.0-wmf.10/includes/api/ApiQueryBase.php(427): Wikimedia\Rdbms\SelectQueryBuilder->fetchResultSet()
#6 /srv/mediawiki/php-1.39.0-wmf.10/includes/api/ApiQueryUserContribs.php(270): ApiQueryBase->select(string, array, array)
#7 /srv/mediawiki/php-1.39.0-wmf.10/includes/api/ApiQuery.php(631): ApiQueryUserContribs->execute()
#8 /srv/mediawiki/php-1.39.0-wmf.10/includes/api/ApiMain.php(1902): ApiQuery->execute()
#9 /srv/mediawiki/php-1.39.0-wmf.10/includes/api/ApiMain.php(874): ApiMain->executeAction()
#10 /srv/mediawiki/php-1.39.0-wmf.10/includes/api/ApiMain.php(845): ApiMain->executeActionWithErrorHandling()
#11 /srv/mediawiki/php-1.39.0-wmf.10/api.php(90): ApiMain->execute()
#12 /srv/mediawiki/php-1.39.0-wmf.10/api.php(45): wfApiMain()
#13 /srv/mediawiki/w/api.php(3): require(string)
#14 {main}
```
==== Impact ====
==== Notes ====