Tracked in Phabricator...

https://phabricator.wikimedia.org/T146576

El 25/09/16 a las 12:51, David Abián escribió:
> I'm also experiencing issues and finding 502 Bad Gateway errors.
> 
> However, they aren't related to regular expressions. These issues also
> appear in other cases, even with the simplest queries.
> 
> https://davidabian.com/downloads/wikidata/502-error-sparql.png
> 
> 
> El 25/09/16 a las 12:32, Ed Summers escribió:
>> I've been experimenting a bit with queries that contain regular expressions 
>> and have noticed that they seem to be triggering 502 Bad Gateway errors. Or 
>> perhaps it's just a coincidence and there were other things going on around 
>> 10AM GMT?
>>
>> Here's an example query where I'm looking for cities that start with 
>> "Silver":
>>
>> ---
>>
>> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
>> PREFIX wd: <http://www.wikidata.org/entity/>
>> PREFIX wdt: <http://www.wikidata.org/prop/direct/>
>>
>> SELECT ?s ?label
>> WHERE {
>>   ?s wdt:P31 wd:Q515 .
>>   ?s rdfs:label ?label
>>   FILTER(regex(?label, "^Silver"))
>> }
>> LIMIT 15
>>
>> ---
>>
>> Am I doing something wrong in the query? Occasionally it seems to work, but 
>> most of the time it waits for a while and then I get the 502 error. Any 
>> guidance you may have would be appreciated.
>>
>> //Ed
> 
> 

-- 
David Abián - davidabian.com
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