Dear list,
I am experiencing unexpected problems with running Queries on FactGrid. (You find some
sample queries here:
https://database.factgrid.de/wiki/FactGrid:Projects) The error code
is:
Can anyone make more sense of the information and how to handle it?
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>502 Proxy Error</title>
</head><body>
<h1>Proxy Error</h1>
<p>The proxy server received an invalid
response from an upstream server.<br />
The proxy server could not handle the request <em><a
href="/sparql">GET /sparql</a></em>.<p>
Reason: <strong>Error reading from remote server</strong></p></p>
<hr>
<address>Apache/2.4.25 (Debian) Server at database.factgrid.de Port
443</address>
</body></html>
If I have killed the application it was with an attempt to get given names with our
(deprecated) string Property P88 - trying to get the names together with the respective
P101 "place in sequence" qualifiers.
Please tell me that it is impossible to kill our SPARQL with flawed scripts for queries.
Cheers,
Olaf
Dr. Olaf Simons
Forschungszentrum Gotha der Universität Erfurt
Schloss Friedenstein, Pagenhaus
99867 Gotha
Büro: +49-361-737-1722
Mobil: +49-179-5196880
Privat: Hauptmarkt 17b/ 99867 Gotha