CGI upstream problem

Philip Rhoades phil at
Wed Jun 7 13:10:50 UTC 2017


I have a number of Ruby test?.cgi scripts that work fine but this one 
shows an

2017/06/07 21:32:22 [debug] 15522#0: *32 http upstream check client, 
write event:1, "/cgi-bin/fb_chatbot4.cgi"
2017/06/07 21:32:22 [debug] 15522#0: *32 http upstream recv(): -1 (11: 
Resource temporarily unavailable)

Of course it is more complicated than the little test scripts but it has 
been working fine for a while and then stopped a few days ago without me 
noticing - I can't think what I might have done that has changed the 
situation . .  The chatbot is running and listening on the right port 
and can be talked to via local and remote shell scripts OK . .  If I run 
the fb_chatbot4.cgi script with test data it also works OK (instead of 
trying to connect from Facebook Messenger -> nginx).

Anyone got suggestions about how to debug further?


   Fedora 25 x86_64


Philip Rhoades

PO Box 896
Cowra  NSW  2794
E-mail:  phil at

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