cache key > 1049 characters results in 502

[James Beal]

On 24/08/2018 08:59:09, James Beal <james_ at catbus.co.uk> wrote:
We currently use caching for guests, our search pages use long urls to pass the parameters to our application. Currently searches that worked for logged in users don't work for guests.

I can show the issue with these two curl examples ( which are not obviously valid searches )

James Beal: 

After applying strace the solution appears to be:

 proxy_buffer_size   128k;
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