Should we be returning 500 instead?

Yes. To be more concise, I'd think that 503 [1] is appropriate. A 4xx is not appropriate IMHO, because [2]:

[[
The 4xx class of status code is intended for cases in which the client seems to have erred.
]]

Cheers,
        Michael

[1] http://tools.ietf.org/html/rfc2616#section-10.5.4
[2] http://tools.ietf.org/html/rfc2616#section-10.4
--
Dr. Michael Hausenblas, Research Fellow
LiDRC - Linked Data Research Centre
DERI - Digital Enterprise Research Institute
NUIG - National University of Ireland, Galway
Ireland, Europe
Tel. +353 91 495730
http://linkeddata.deri.ie/
http://sw-app.org/about.html

On 28 Jun 2011, at 07:21, Bill Roberts wrote:

Looking for some advice from the community. If we time out a slow- running SPARQL query, what is the most appropriate HTTP status code to return to the client? We had been trying 408, but the problem with that is that some clients (notably Firefox) take it on themselves to keep retrying the request, which isn't really what we want.

Should we be returning 500 instead?

Thanks

Bill




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